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Someone who sleeps with everyone. Will do anything that walks.
Dang i heard that girl had sex with five dudes in one night. Yeah she is such an Erwin.
Erwin by DAS group August 16, 2011
a beer or alcoholic drink that has been left out unfinished. usually found in large numbers the next morning after a party.
1st guy: "dude, grab me a beer while you're up."
2nd guy: "no way, you already have two erwins sitting in front of you."
erwin by b.o.d. July 8, 2007
The best person you will ever meet. He is much better than his friend Aaron who is a disappointment to his family. Erwin is tall and smart while Aaron is small and dumb.
Man I was Aaron was Erwin.
Erwin by Aar0n119 November 26, 2018
Someone who would rather stay home and cook bacon than win incredible prizes from old navy's best week ever.
that fag is such an Erwin
Erwin by DJ Diamondz September 10, 2008
To block the cock of ones male friend.
To stop a male friend from recieving vaginal action.
Oh crap, that dude just Erwined me!!!
Erwin by Dave13579 January 4, 2008
An erwin is a loser, someone who fails at life, someone who has horrible luck, or someone who is just really stupid.
jake: I went to go see a movie today, but when i got there it had just sold out!

Tony: You're such an erwin you should have shown up earlier.
Erwin by anton barbosa August 20, 2006