Top Definition
a girl that has a roast beef vagina so bad that you want to put mayo and swiss cheese on it and call it a sandwhich
that bitch is such a twat flapper she better open her own subway
by sakt69 February 06, 2011
1 more definition
One who enjoys flapping the twat
IE giving a female mind blowing oral sex
she blew when she was given oral by the twatflapper
by Mikey B61 February 23, 2007

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