SIL 

Sister-In-Law

Wifes sister, brothers sister.

also see SILF - Sister In Law I'd Fuck

"Man, Your SIL is Smokin hot"

SIL by EVP January 22, 2008

SIL 

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!"

SIL by Grymm Deth September 30, 2009

SIL 

abbreviation for "sister-in-law"

My husband hadn't texted me back, so I just went to lunch alone with my SIL.

SIL by shortysyndrome32 June 3, 2017

Sil 

Sil- a shorter word for silly

Don’t be sil

Sil by Lani p November 22, 2021

sil 

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.

sil by lil em March 12, 2008

sil 

a shortened version of silly

gosh nyomi! you're such a sil!

sil by Caitlin C November 12, 2005

sil 

Seizure in laughter, similar to lol.

"Why did the girl fall off the swing?"
"I don't know; why?"
"Because she had no arms, duh!"
"OH, SIL! SIL SIL SIL!"

sil by srrh August 7, 2004