A sexual act involving four people, in which a person who is getting fucked is eating the ass of another who is performing oral. Or just a big line of people eating each others ass. Your choice.
1. Becky, who is getting ducked from behind is eating Sally's booty. While that is happening sally is blowing some dude.
2. A bunch of people get in a line on their hands and knees and start eating some booty.
Human centipede
For best results, being properly hydrated prior to attempting the human brita results in colored liquid being ingested while clear liquid being evacuated, thus the human brita.
Extra points for both input and output utilizing cups or glasses.
Dude, I didn’t want to leave my drink and the restroom line was too long, had to pull a human brita. At least I know I’m hydrated.
An offensive insult used to describe a female that like prefers underweight males, indirectly referencing their intercourse which would resemble a pencil being sharpened.
I saw her in the car with that skeleton-looking kid, you know she's being used as a human pencil sharpener.