The act of have a finger shoved up a males ass while A) getting a blow job or B)Jerking off
She was blowin' the hell out of me and finished me off while giving me an underground hammer
by Snaggeltooth 27 November 23, 2010
Get the Underground Hammer mug.
getting a handjob while the chick jams her thumb in and out of your ass.
So im getting a handjob from this ten dollar whore and the next thing you know im getting a pump with an underground hammer .
by Dick Fitzwell Esq September 1, 2009
Get the Pump with an underground hammer mug.