Deep throat

Deep throat is to give a blowjob in a manner that the guys cock slides down the girls throat, until she has all of the cock in her mouth. It requires the girl to be able to control her gag reflex, and to hold her breath for a while too!

Deep Throat was also a name of a classic hardcore porn movie that examined this very fact, back long before porn was considered legal and mainstream.

Good sites for deep throat action include Throated and Deep Throat Love