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1.
when you want to sound like a faget, but funny as hell at the same time and you dont want to say silly, thats where silla comes in.
shane:hey micky your such a silla
mikayla: well your a silla billa
shane: oh ya!!
shane: jeathus chrithus!!
by shane boswell February 12, 2007
 
2.
A way of telling someone they are funny, or silly.
You are so silla.
by Melinda Versluys January 12, 2004
 
3.
A quick way the sum up or type 'See you later'
THe word is said fairly quickly
***** says: talk to ya later man
$$$$$ says : kk silla
by LaGe||| December 13, 2003