Ihswym 

Pronounced as I swim, ihswym is an acronym short for "I have/had sex with your mother"
Used as an insult towards another person.

"Hah, usually when I come over to your place, Ihswym instead of hangin' around you"

Ihswym by BAKR, Nordean December 23, 2008

irswymuaaanui 

"It really sucks when you make up an abbreviation and nobody understands it."

1: t4u

2: What?

1: Thanks for understanding.

2: Oh. irswymuaaanui.

1: What?

irswymuaaanui by a typical teen August 4, 2009

ISWYM 

I see what you mean.

DYSWIM???? Y!!!! ISWYM! CRAZY!

ISWYM by Momma's Smart October 8, 2010

irswymuaaanui 

"It really sucks when you make up an abbreviation and no one understands it."

1: t4u
2: What?
1: Thanks for understanding.
2: Oh. irswymuaaanui.
1: What?

irswymuaaanui by your typical teen August 4, 2009