to poop your pants (Often used reflexively "sich+Dative" but it doesn't have to be.)
to be scared ("sich+Dative einkacken" - quite common colloquial phrase.)
A po-etic look at the German word "kacken" and how to harness the full colloquial potential of it and its brothers. With audio examples and visuals.
kacken, die Kacke, verkacken, ankacken, abkacken