not give a monkey's

: to make a present of

: to grant or bestow by formal action

: to accord or yield to another

: capacity or tendency to yield to force or strain : flexibility

: the ability of a material to bend or stretch

: a nonhuman primate mammal with the exception usually of the lemurs and tarsiers

: a person resembling a monkey

: a ludicrous figure : dupe

: mimic, mock

: to act in a grotesque or mischievous manner

: fool, trifle