committing is a rare occurence in which the person committing cums, vomits, and shits themselves in a convulsive manner. Usually done after participating in some hideous act as in sleeping with an ugly girl or seeing someone doing something that warrants the convulsive act.
Dude: Guy last night i slept with this hideous bitch!
Guy: What did you do?
Dude: I looked at her and committed all over the place.
Guy: Legendary committing action!!!