2 definitions by calistoe

The hand your preferrably female partner uses to slide down your cock as she is on her knees preforming oral sex.
Corey: "Dude, my girlfriend almost got her bj hand cut off by a car door?"
Eric: "That would be horrible, then she wouldn't be able to keep balance when blowing you!"
by calistoe June 13, 2008
Get the bj hand mug.
the same as understand. a mix between understand and get. a common mistake made by dumbasses
Sara: Derek, can you help me with my math homework?

Derek: Sorry, I didnt underget it.

Sara: Underget? What a dumbass.

Derek: k.
by calistoe July 31, 2008
Get the underget mug.