Synonyms and related words :
blow, blow out, ca-ca, clean out, clear, clear away, clear off, clear out, clear the decks, crap, deplete, drain, dung, eliminate, empty, empty out, evacuate, excrete, exhaust, number two, purge, remove, scour out, shit, spend a penny, stool, sweep out, take a shit, unclog, unfoul, vent, void