Tart
WordNet
adjective
(1) Harsh
"Sharp criticism"
"A sharp-worded exchange"
"A tart remark"
(2) Tasting sour like a lemon
noun
(3) A pastry cup with a filling of fruit or custard and no top crust
(4) A small open pie with a fruit filling
(5) A woman who engages in sexual intercourse for money