To shit and vommit simontaniously, usually resulting from extensive alcohol consumtion.
"My stomache is going crazy, I think I'm about to shommit, where can i find a bucket and a toilet?"
de Luke Swiderski 7 octobre 2003
When you are so sick that you begin to simotanously shit and vomit at the same time.
I was sitting on the toilet not feeling so well when i began to shommit.
de swallytrip 9 janvier 2009