Taco Monkey's definitions
A twosome would involve two normal-sized people, so therefore a one-and-a-halfsome would involve a normal-sized person and a person half the size of a normal person, or a midget.
by Taco Monkey January 2, 2007
 Get the one-and-a-halfsomemug.
Get the one-and-a-halfsomemug.