Top Definition

Wifes sister, brothers sister.

also see SILF - Sister In Law I'd Fuck
"Man, Your SIL is Smokin hot"
by EVP January 22, 2008
An abbreviation for Strong Independent Lady.

a) Term used to protect a woman from being called a derogatory name.

b) Term used as code for a mean, mean, witchy, shrew of a woman
You: "Man, my boss is such a $%^&!"

Them: "No she is just a Strong and Independent Lady and you just can't handle that."

You: "Yes! thanks for High Roading me there. You're a SIL too!"

Them: "Thanks!"
by Grymm Deth September 30, 2009
a shortened version of silly
gosh nyomi! you're such a sil!
by Caitlin C October 27, 2005
Shit Intensity Level; From 1 to 10, 1 being a pleasureful dump, 10 being hot-tamale diarrhea.
Guy: Man dude, I had a SIL of 10 just now, shouldn't have had that taco bell last night...

Guy's Friend: Dang dude! That must have hurt!
by hudzell September 29, 2014
Should I Leave
This bitch is annoying SIL?
by Zaddie March 01, 2014
Shortened version of School of Information and Library Science.
The SILS program at UNC is supposed to be really excellent.
by Yo386 September 27, 2010
something that is described as being cute, little, lovable, italian, gorgeous, and so on. Used when describing a person you feel affection towards.
Myles is such a sil! or Love you sil.
by lil em March 10, 2008
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