Yiddish for 'cunt'.
According to the entry on slang in the Encyclopedia of homosexuality almost all terms for gay men fall into four categories: 1. those who take an active 'masculine' role - the insertor role in anal inercourse; 2. the 'passive', 'feminine' role, the receptor; 3. effeminate men who may be gay; 4. the category of the fellator.
Many slang terms for the 'passive homosexual' directly personify him as a vagina or as an anus.
"Slang" in the Encyclopedia of Homosexuality Ed. by Wayne R. Dynes