Surprising someone with a thumb up the butthole when they're not looking, while exclaiming, "goose is a gander!"
Tiffany: "What the hell are you doing back there?"
Nora: "Goose is a gander!"
by norandtiff January 26, 2011
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Used to describe someone that doesn't understand that was is good for most people is also good for them; i.e.; what is good for the goose is good for the gander!
JB: Hey man, our supervisor is a dick, he treats us like shit but expects to be treated like a king!?!
L: Yeah, he is just a Goose Gander Cunt!
by DJ Talleo September 11, 2015
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A way to say a man is bisexual.

It comes from "what's sauce for the goose is sauce for the gander," meaning that the goose and gander despite differences have shared interests. But in this case the shared interest is that of the sauce provider.
Tony: I saw James out last night with Rebecca, but it kind of looked like they were on a date or something. Weird.
Sara: Why weird?
Tony: Isn't James gay? I know he used to date Terrence.
Sara: Oh, no---not gay; he's got sauce for the goose and sauce for the gander. Always been that way.
by bdawgy0 July 7, 2023
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