an impertinent, presumptuous person, especially a young man; whippersnapper.
2.
an impudent, mischievous child.
3.
Archaic. an ape or monkey.
Origin: 1400–50; late Middle English Jakken-apes, literally, jack (i.e., man) of the ape, nickname of William de la Pole (1396–1450), Duke of Suffolk, whose badge was an ape's clog and chain
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a stew of meat, vegetables, potatoes, etc.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
the offspring of a zebra and a donkey.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
[C16: variant of Jakken-apes, literally: Jack of the ape, nickname of William de la Pole (1396--1450), first Duke of Suffolk, whose badge showed an ape's ball and chain]
c.1449, "a monkey," also "an impertinent, conceited fellow;" apparently from Jack of Naples, but whether this is some specific personification or folk etymology of jack (n.) + ape is unknown.