sex act where the man and women are both on their hands knees, ass to ass (facing away from eachother). the man then sticks his dick between his legs and in the women's pussy. to hump, the man rocks back and forth. the undertoe part comes from the fact that its hard not to fall.
My girl loves the virginia beach undertoe, but I always get a cramp.
ayon kay Will Curtis ika-13 ng Enero, 2007