look up any word, like hipster:
 
1.
When you're happy about an un-expected victory.
"Sam was like, yeeeeh i'm guna own you at PES8 init keka bean sprout. Then I won him and I was well chimmin init blad" - Jethro "awesome" King
by Jeffhead September 26, 2008
 
2.
1. Butting into a conversation you are clearly not a part of.

2. Creeping on others while they are talking.

3. Eavesdropping
Did you just see that kid? He was just chimmin' in on us.
by Steezmaster McSteezy January 05, 2010