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31er refers to a person who betrays his friends and other close people. The expression originates from Germany, where a person may receive a lighter punishment for drug offenses if they help law enforcement catch other offenders (paragraph 31 of the German Narcotics Act).
We wouldn't have been caught for the prank if it hadn't been for John—he's such a 31er!
31er by Venomist June 19, 2019
Related Words
319er • 31er • 315er • 329er
315ers are simple folk located east of the monroe county line. They prefer the satisfaction of killing a cucumber eatin' varmit over the prospect of a well mowed lawn and a paved driveway.
Ish was proud to be a 315er and had many a deer rack on his shanty wall to show for it.
315er by Ray Knobs September 25, 2006
You say 31er when someone is a betrayer or u cant trust him.
You also say it when u are dissapointed in someone.

31er ist mostley used in the German Language
Examples:

My Friend didn't follow me to the cinema yesterday. He's an 31er!
German: Mein Freund ist gestern nicht mit mir ins Kino gegangen, was ein 31er.
or

My Girlfriend cheated on me what an 31er move.
German: Meine Freundin hat mich betrogen, was ein 31er move.
31er by asseater31 December 27, 2018
A horrible condition also known as the 459er where one minute before you are to exit your asinine workplace a higher up walks up and says "Got a minute" causing you to work another hour and a half.
coworker: Hey Chad want to go for a beer?
Chad: Can't... shitballs just gave me the 329er
329er by Larry Brown June 22, 2007
Referring to those that live in the 315 area code, specifically in areas just east of Rochester Rochacha or Monroe County. 315er territory and the people therein bear remarkable resemblance to the hick towns of southern states. Oddly, 315ers often have southern accents, missing teeth and hang out at places like Agway or Country Max.
For a long time, Susie's friends thought she was from Kentucky but it tunred out she grew up a 315er.
315er by yamagan41 January 22, 2005
Rocco der 31er
31er by gesichtsmensch November 15, 2018
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