gag-o-magnifier 

The part of the brain connected to the back of the throat that regulates the intensity of a gag reflex. Upon receiving sensory input from the brain, the gag-o-magnifier then calulates the gag factor - taking into account synergistic variables such as alcohol or drug over indulgence, excess pie intake, and outside influences such as a blast of shit.

Gag-o-magnifier is from the Ninja Turtles cartoon.

Riding in the back of Elrod's Pinto across West Texas after a bottle of tequila and some peyote buttoms, the gag-o-magnifier kicked into warp mode and had me hurling like exorcist girl.

gag-o-magnifier by wheaty June 1, 2005