Dude, check out all the hot chicks in this cafe! ... I know, I've got to try and hide my raging purple pickle...
In other words, the explosive anal expulsion of hot liquid turds.
Occurs when, after eating dodgy McGreaseBall Burgers (or similar), the body stubbornly refuses to vomit - instead, as they've gotta come out somewhere, a bomit is born.
OMFG, I just bomited all over your couch, sorry dude!