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good-for-nothing 

Someone who is useless. As in, REALLY useless and can't do anything right.
Sarah: John, why is the trash still here and why is the lawn not mowed yet?
John: I tried once and I didn't know how to do it.
Sarah: Good-for-nothing loser
good-for-nothing by Rockcold February 1, 2016

good for nothing 

A phrase that can describe two entirely-opposite ends of the meaning-spectrum, depending on how the words are punctuated.
A "good-for-nothing" is, of course, someone who lacks the knowledge and/or motivation to make himself useful in any way. But on the other hand, someone who zealously toils and struggles his a** off trying to totally "be a saint 24/7" but receives no better treatment as a result of it --- in other words, his fellow humans mistreat him with just as much chilliness and lack of charity as if he were just a "good-for-nothing" --- will feel as if he's been "good for nothing"... he's totally worn himself out trying to be "Honest Abe" and "Sir Galahad", yet nobody acknowledges or appreciates his efforts, and so he's behaved himself exceptionally but received zero reward or praise for his efforts.
good for nothing by QuacksO January 6, 2019

Good for the Tuna 

A euphemism for I don't give a shit. Especially useful in response to unsolicited bragging or otherwise useless information. Stems from Costanza in The Opposite episode of Seinfeld.

Seinfeld: Chicken salad's not the opposite of tuna. Salmon's the opposite of tuna. Cause salmon swims against the current and the tuna swims with it.

Costanza: "Good for the tuna."
douche: "I worked really hard this weekend, but it payed off -- my boss said I did a great job!!"

dude: "Good for the tuna"
Good for the Tuna by ChrisGGG November 8, 2010

good for you 

When saying good for you to someone, the real meaning behind your words are "GO FUCK YOURSELF!"
the teacher was telling me about his unimportant weekend events, I said "good for you" because I hated him.
good for you by viafive May 5, 2003

Good for you 

A way of saying that you don't give a shit.
Guy: I got minecraft last decade.
Steve: Good for you.
Good for you by Fuck off_2 April 7, 2019

good for you 

A rude remark made by someone, when in conversation, really don't care about the current topic.
Hey! I made 500 combos on DDR!
Good for you.
good for you by Furik January 30, 2004
More from Urban Dictionary
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

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026

Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
Word of the Day on September 29, 2026
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
After we broke up, he was floxi to me.
floxi by Dr. Geek May 13, 2009
Word of the Day on September 28, 2026
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