Laughing out loud. Adding -ing to a word means something is going on, has been going on, or will be happening. Lol stands for laugh out loud. So lolling is laughING out loud.
Sophia: knock knock
Gabi: who’s there?
Sophia: orange
Gabi: orange who?
Sophia: orange you glad I didn’t say banana
Gabi: Sophia’s so funny I’m “lolling”
A play on the English writer J.K. Rowling's (writer of the Harry Potter Series) name. It usually means "Just kidding, and I am laughing aloud at the same time" or just "I am currently laughing aloud".
Frank: Dude you're such an asshole sometimes, you know Sarah and I broke up last week.
Tongue Lolling is used to describe when a girl in a hentai is fucked silly to the point her eyes roll up and her tongue hangs out like a dog. It's prettycommon in hentai to see a girl lolling her tongue out as some guy fucks her brains out.
That girl was being fucked so hard she started Tongue Lolling. Fucking hot