a gettin'
A 'gettin' is when you're so deep in a kiss you forget your own name. It's also called making out, tongue wrestling, or whatever your mom would call it.
My brother and his girlfriend were kissing like they were trying to fuse into one person.
At the party, the guy next to me and his friend were making out like they were the last two humans on Earth.
My friend and his crush were kissing so hard they forgot the pizza was getting cold.