A sexual act involving two or more partners and a laptop. The receiving partner(s) are engaged from the rear and are used as a platform for the laptop. The active partner(s) now may penetrate their partner(s) from the rear while retaining their ability to browse the internet, watch porn, play MMORPGs and instant message.
Nothing gets me hotter than doggietop with a minesweeper game. Damn we should make it an orgy and fire up some Unreal Tournament!