(verb) The doing or receiving of a blowjob (the sucking of one's penis), in which the one giving the blowjob has Pop Rocks in his/her mouth.
Jimmy: Yo, whats that popping sensation?
Alexandra: Oh you didn't know? I'm giving you Poppy Toppy.
Jimmy: Man that feels good!
Alexandra: Yeah it's super sweet too, I bet it'll taste even better in a minute or two *winks*