v. & n. US colloq.
--v.
1. tr. a fail (an examination etc.). b fail (an examination candidate).
2 intr. (often foll. by out) fail utterly; give up.
--n. an instance of flunking.
Phrases and idioms:
flunk out be dismissed from school etc. after failing an examination.
Etymology: cf. FUNK(1) and obs. flink be a coward