A reference from Harry Potter for having the ability to talk to snakes. This reference is used when someone has mastered the art of not just giving a good blowjob, but giving the best blowjob ever!
Man, Becky legitimately gave the best head ever! I don't know how she made my head spin like that, but damn she must've known parseltongue.
Mate, I was in the bush last week and felt a bit horny so grabbed a dead brown snake to do the business and it came alive! I got totally parseltongued!
