a woman that a guy dates for the primary purpose of providing his steady source of sex. The woman is almost always unaware that this guy is actively seeking out as many side pieces as possible. See also Main, main bitch, main squeeze.
Dude 1: This club is wack. Its looks like our chances of meeting some fine honeys are pretty slim.
Dude 2: No big deal! I got my main piece waiting for me at home.
Dude 2: No big deal! I got my main piece waiting for me at home.
by toast455 February 18, 2006