When a girl feels horny and her vagina starts to pulsate with excitement.
"Oh my god I'm getting fanny gallops watching that!" *ponographic film*
by Leoleanne September 17, 2008
Strictly confined to women who get a sudden rush in the groin area of an orgasmic or erotic nature. Often taken by shock and usually envoked by an erotic memory or at the sight of a very attractive potential sexual partner.
God he's so sexy he's givin me fanny gallop!
by Coggy September 06, 2006