Top Definition
Pop culture euphemism for;
1. Person(s) who kills a good mood, fun killer, party pooper
2. Bringing a highly inappropriate item ill suited for the situation.

Origin:
Based on this ridiculous account;
"In Fargo, N.D., a man, 33, reportedly stabbed another man, 37, during a threesome. The stabbing allegedly occurred when one of the men reportedly refused to switch positions during the sexual romp."

The expression bounces off the old adage Bringing a knife to a gunfight.
"Ah shit, don't invite that guy! He'd bring a knife to a threesome".

"His friend was known for bringing a knife to a threesome, so he wrote a list items they would need; better safe than sorry".

"Who brings a knife to a threesome!? Seriously!"
by Stellababe June 08, 2013

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt