Similar to shrimping, this word is derived from the snail-shape of the cochlea, found in the inner aural canal.
Offeree: "Gross, i'm totally not into french food."
Offeror: "Nah nah; there's no need to buy you dinner first. Just let me tell you a secret."
guy 1: what were you doing last night dude?
guy 2: i was totally snailing this girl
guy 1: omg no way you snailed her!
"Jenna let me snail her, I think I love her"
"She's a ride or die bitch, I heard she even into Snailing"
Guy 2: Fuck you she's not the Snailing type