3sum

When two people have sex, And the third person video records it.
Bob: Yeah, I had a 3sum last night!
Tom: Was it good?
Bob: The third person, Was such a good recorder, It could have been a porno!
Tom: When you make it A movie, I'm buying it.
by BlahhhhhhBiiiittchh! January 15, 2010
Get the 3sum mug.