When used, the word means that you find another petson attractive or appealing. It is the sound that womans' panties make when they are coming off. This act is usually prompted by seeing an attractive person.
Amy: Did you see Marks new profile pic? He has no shirt on and sweat is glistening off his arm muscles.
Amber: Swoosh!
OR
Amber: Amelia is so damn sexy. The way she bites her lip drives me crazy.
Brandi: I know right? Swoosh.
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