A sexual act, similar to cunnilingus, wherein the 'performer' places the backs of both hands to their cheeks and inserts all of their fingers and their tongue into the female genitalia, and shouts "blarffl" in an impression of the eponymous villain from the 1987 Arnold Schwarzenegger classic 'Predator'.
"BLARFFL BLARFFL BLARFFUNKL"
- Dude, I totally gave this chick mad predalingus last night!
- That's balls nasty, man. Yous a player and no mistake!