look up any word, like smh:
 
1.
periwinkle's mama say what
Yo , i did yo moms , You tite !
" PMSW !?!? You want to repeat that ?? "
by StewieChick July 24, 2009
 
2.
MSN talk for Pissing Myself Waiting.

Bob: I can't wait for Sims 3 to come out

Jim: Yeah man I'm PMSW
by Vv. August 18, 2008