Cunnilingus is a term for orally stimulating the vulva and clitoris. This is a type of oral sex.
When a man receives oral sex, it's called fellatio. For a woman, it's called cunnilingus. To perform cunnilingus, someone uses their mouth to stimulate the vulva and especially the clitoris, eventually bringing the woman to orgasm. In slang, performing cunnilingus is a form of giving head. And if you want to be funny, call a person who does cunnilingus a cunning linguist.
