guy tops a girl
when a guy is shifting/meeting a girl and he slides her hands up under her top and bra and squeezes her tits
beware, if done without asking first get ready for a kick in the balls
danny: did you hear that shane topped rebecca last night? she got so turned on she started grinding against his leg so he stuck his finger up her skirt and started fingering her! you should hear some of the sounds she made!