When two lesbians engage in the act or oral sex, hence stimulating each other's clitori. Often mistaken for turnip tickling, but this is different: turnip tickling is usually done with the hands. Also referred to as eating out, this is not to be confused with going out for seafood.
Lesbian 1: "Hey babe, you down for some oyster splashing?"
Lesbian 2: "You mean seafood?"
Lesbian 1: "No babe." *Wink*
Lesbain 2: I don't get it...