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2.
A bra constructed to inhibit the flopping of Floppers. A support for a woman's breasts that keeps them from flopping around.
I hope you remembered to wear your flopper stopper, Charmaine.
by Cap'n Bullmoose April 18, 2005
 
1.
A bra. Especially one for floppers or wobblyfloppers.
Sweetheart, let's go in here. I have to buy a new flopper stopper.
by Tuna Wanda May 21, 2005
 
3.
a brassiere
She was surprised to learn that most woman do not wear a properly fitted flopper stopper.
by The Return of Light Joker July 06, 2010