A Wonderbra or similar brassiere, so called because it makes breasts far more apparent to the viewer than when it is not worn.
girl1: you buying that dress for your date tonight?
girl2: probably, but I'll need strap-on tits for the full effect.
girl2: probably, but I'll need strap-on tits for the full effect.
by mistertea November 27, 2006
When a girl with big breasts wears a bag with the strap going through the middle of her breasts making them look even bigger.
by -The Boobie Watcher- June 6, 2011