Wiktionary
piss ant
alt. 1 A wood ant (from the smell of its nest), or an ant belonging to one of various other minor species. 2 (context rare English) (alternative spelling of pissant English) n. 1 A wood ant (from the smell of its nest), or an ant belonging to one of various other minor species. 2 (context rare English) (alternative spelling of pissant English)
Usage examples of "piss ant".
Scaring a little piss ant teacher isn't going to help you learn anything.