That weird liquidy shit when you open your yogurt cup.
Dude#1: dude, wtf is this pre-cum shit at the top of my yogurt cup
Dude#2: That's Pregurt, Just stir it in bro.
This term originates from the thick white donair sauce, but instead, is referencing thick white boner sauce (I.e. make ejaculate).
Girl: Iâd like some extra bonair sauce please
Guy: Cumming right up ;)