1650s, "one who peeps," agent noun from peep (v.1). Slang meaning "eye" is c. 1700. From 1590s as "young chicken" and 1857 as "tree frog" (American English), both from peep (v.2).
雙語(yǔ)例句
1. And vice versa for a whale - sized frog adjusted peeper calls.