Barbra Streisand
Imagine a reverse 69, you are sitting on the girl's face and with your head towards her feet. You put your balls in her mouth and she inserts her nose in your asshole. This position requires a woman with a pointy big nose, ala Barbra Streisand, hence the name of the position.
Example:
This girl's got me all horny, I think I'm going to ask her to do a Barbra Streisand, Im due for an ass poking. .
This girl's got me all horny, I think I'm going to ask her to do a Barbra Streisand, Im due for an ass poking. .