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 pretty common 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
by Smugleaf July 19, 2010