suck wind

a type of flatulation that can only be released through the tight clenching of the buttock muscles. the colloquial "suck in your butt" applies here.

Okay now suck in your butt! Whoops...sorry. Suck wind.

WIND-SUCKING

aspiration of air and debris into the vagina.

She nasty. Girl grabbed on to a door with her front teeth and then WIND-SUCKed all the dust bunnies right up her cucci.

OR

"The most common symptom (sign) of wind-sucking is the gurgling noise or sound produced by the aspiration of air into the vagina, or its expulsion," Caslick observed.