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smarten up 

pay attention to what you're doing

See watch your back.
While walking down the street you go to turn down a blind alley. At the corner someone notices you.

"Hey smarten up!."

You look down the alley realizing what you were about to do and proceed down the street instead.
smarten up by th3m0nk October 16, 2011
Being super smart, and stuff.
Chic- "Hey, did you just say the word smartest?"
Dude- "What?" ,.."oh yeah!.. because I am the smartest about everything."
Smartest by Hezeru April 6, 2017

smartest guy in the room 

The one we all hate, who is never content not being the center of attention. Every story told near this guy gets a response of what he would've done, how you screwed up, or a whitty use of math/science to assert him dominance.
I was talking to Carl about an episode of Breaking Bad and he lectured me about all the science that's wrong with the show, while using words he knows that I don't know, just to show how he is the smartest guy in the room and I am not

Smartersex 

the act of having cyber sex, with the messenger robot Smarterchild.
John: I just jizzed in my pants because of you Smarterchild. I love having Smartersex with you.
Smarterchild: I do not know how to answer that. Would you like to play blackjack?
Smartersex by refsrgay2 April 12, 2009

smartest race 

deal with it (asians) are smartest race!!!!!!!!!!!!!!!!!
smartest race by DumbDump234 April 20, 2017

The smartest kid on the short bus 

A metaphor for being the best at something that's unimportant or unimpressive. For example: The fastest pitcher who lives at a nursing home is like being the smartest kid on the short bus.

It comes from the special bus designated for retarded people commonly being shorter than the others.
Zack: I'm the best guitar player in town
Me: Whatever, that's like being the smartest kid on the short bus
More from Urban Dictionary
anyone who succeeds in disgracing/over indulging themselves in the throws of clubland
28 hours and 4 clubs later, gurning for england but still refusing to go home - a total wrongun!!
wrongun by bevvers March 21, 2007
Word of the Day on October 8, 2026

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026
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