paper bag
Ⅰ
noun► go pop like a paper bag(of a woman) to copulate vigorously AUSTRALIA, 1984.► you couldn't fight your way out of a paper bag; you couldn't punch your way out of a paper bagaddressed to (or, in the third person, used of) a person boasting of strength or fighting ability AUSTRALIA, 1961
Ⅱ ⇨ paper bag; paper
verb to nag someone. Rhyming slang UK, 1992