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common denominator 

(n.) A factor that appears the same in different situations. Derived from mathematics where the numerator is divded by the lowest common denominator in fraction questions where it must be discovered which fraction is bigger by making the denominator the same.
Your face is the common denominator in three robberies at your place of work, which implies you have a connection to these robberies, although we could be wrong.
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Common Denominator 

A Justin Bieber love-meets-mathematics song.
Strangely, no one gets the lyrics right on any site.
Person #1: "Just a fraction of your love fills the aiir...."
Person #2: "Hey, isn't that Common Denominator by Justin Bieber ?"
Person #1: "It is !"
Person #2: "I love that song, but I can't find the right lyrics on the net"
Person #1: "Neither can I, who understands a song about math anyway ?"

Common denominator problems 

When someone complains about how bad something is, so they substitute it for another thing they believe is good, only to complain how bad it is almost immediately after the substitution. The individual making the complaint has no self awareness and therefore doesn't realise they are the problem and the things they claim are bad, probably aren't.

Example 1:

A woman is bored of sex with her husband, so she divorces him and finds a new and exciting man to have sex with. Then she realises the sex is boring and repeats only to find the sex is still boring. It is likely she just sucks at sex.

Example 2:

A man is frustrated with the demands of his job and quits after a year taking on a similar job elsewhere believing it will be better only to realise that he is frustrated with the demands of his new role. He then repeats this, when in likelihood, he just sucks at managing his workload.
Joe: "man, Bill always complains that the women in this city give bad head"
Steve: "maybe Bill is the problem?"
Joe: "how so?"
Steve: "Common denominator problems, my guy. He probably just has a numb dick"

Lowest Common Denominator

A particular type of obnoxious person one encounters in extremely large groups, or where everybody is universally included. Because there are so many people, there is a significantly higher probability of idiotic people.
Facebook comment sections are terrible. It's just giving voice to the lowest common denominator.

Lowest Common Denominator

1. The number underneath in a fraction after simplification

2. A dumbass or a group of dumbasses
1. "I got half marks in that maths test because I didn't simplify to the lowest common denominator"

2. "I got into a fight with a group of the lowest common denominator, mate"

Dumbest Common Denominator 

The most logically-challenged portion of the general population for which the most obvious warnings, posts, signs and instructions must be written or designed to avoid catastrophe.
On the lid of the coffee cup: Contents may be hot.
On a package of kitchen knives: Caution! Items are sharp.
On a trash bag: Do not place over head.
At a railroad crossing: No parking.
On a clothes dryer: Do not place children or animals inside.

"This is the dumbest sign I've ever seen. Do they think I'm a complete moron?"

"Dude. Gotta plan for the Dumbest Common Denominator."

Slowest Common Denominator

The kid in class who slows down the rest by having to get every last thing repeated to him/her 8 times before understanding it.
Teacher 1) I hear you got Tommy and Linda in English class. I had them last year. They're some really bright kids.

Teacher 2) Yeah, but I feel horrible. It's damn near Christmas and we still haven't finished basic sentence structure because Kyle still doesn't understand subject-verb agreement and he asks me 2 dozen questions per class that I've already answered.

Teacher 1) That's always so unfortunate, when the brightest in the bunch are put in the same classes as the Slowest Common Denominator.

Teacher 2) Yeah. I wish there was room in the budget to have more advanced classes.
More from Urban Dictionary
A dead drop is a location used to secretly pass items between two people, without requiring them to meet.

Spies have been known to use dead drops, using various techniques to hide the items and to signal that the drop has been made. Drug dealers use this as well.

A common place is to duct tape the item to the underside of a toilet cover in a public restroom.

A signal is sometimes used as well to indicate there is something to pickup, like a pile of stones in a certain formation. After checking the drop the signal is removed.
"The dead drop is the restroom toilet at the Gulf station at the corner of Commercial Ave. and Georges Rd."
dead drop by rubberroom July 23, 2008
Word of the Day on November 9, 2026

No Surprises Wedding

A "No Surprises Wedding," or NSW, is a wedding invitation designation that tells attendees that there can be no unplanned announcements, engagements, events or speeches at the wedding - all actions must be pre-approved by the couple. Anyone who performs an unapproved "surprise" will be asked to leave the wedding early.

This designation comes from Reddit, where so many stories of bad wedding behavior indicated a need to communicate expectations for the wedding behavior of attendees.
You are cordially invited to the nuptials of Brian and Tom on October 31 at noon.

Please note that this wedding is child-free (under 10) and a No Surprises Wedding (NSW). Reach out to wedding planner Sami Smith to request approvals or exceptions; please note that exceptions will be rare. Limited child care for under-10s will be available. All approvals will be noted and included in planning. Unapproved, or surprise exceptions, will result in guests being asked to leave.
Word of the Day on November 8, 2026
Ulzzang true definition is "best & "face" = best face in korean. They are basically people with above average looks, sometimes with the use of photoshop and haduri who post their pics online, some becoming internet celebrities.
"Hey, see that chick over there? She's pretty enough to be an ulzzang. :D"
ulzzang by `r i k kit t y February 26, 2008
Word of the Day on November 7, 2026
EBK stands for "Elite Ball Knowledge." 1 In internet slang, "ball knowledge" originally referred to a deep understanding of football/soccer or basketball, but it has evolved into a broader term for having a highly sophisticated, deep, or niche understanding of any specific topic (such as music, movies, or subcultures).
Person A: "That scene was a direct homage to an unreleased 1982 Japanese indie film."
Person B: "Wow, EBK."
EBK by silwhett November 5, 2026
Word of the Day on November 6, 2026
A seemingly endless debate with a idiot
I don't know man im not ready for yap trap stupidity today which always tries to suck you into it
Yap Trap by WolfieSnack November 4, 2026
Word of the Day on November 5, 2026
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