n. & v.
n. sl. 1 a prostitute; a promiscuous woman. 2 sl. offens. a girl or woman.
v. (foll. by up) esp. Brit. colloq. 1 tr. (usu. refl.) smarten (oneself or a thing) up, esp. flashily or gaudily. 2 intr. dress up gaudily.
[ prob. abbr. of SWEETHEART ]