The premature departure of the tip of ones turd or Make
Premake peeks out of the ass just prior to a complete evacuation of the bowels. It combines extreme Urgency with One's need to Make.
Premake is variation of the expression To Make, which is the same as saying Go #2 or take a dump or drop a deuce or Take the Browns to the Super Bowl
Dude, go on to the front of the line. It looks like You've got Premake .
When you've got Premake that serious You may as well start thinking of names for what is sure to follow.