1) It is a simple motion that consists of a person slightly jumping off the ground repeatedly fast while saying "Do the Dooty Doot"

2) Sexual context: a guy who is getting his dick sucked or is pounding some hot chick.

3) Drinking context: in reference to a guy or girl who is completely shitfaced and is dancing in a manner where there head is down, hand(s) up and are jumping. They are also most likely spilling their drink everywhere as they are about to blackout.

Referring to women who are sexually or romantically attracted to other women. Applies to both lesbians and bisexual women, as it is only the same-sex attraction that matters, not any other attractions the women may have.

Originates from the Greek poet Sappho, a bisexual woman from the Isle of Lesbos, from which we get the term lesbian.