Definitions by BAKR, Nordean

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