An app that confused college girls use to put meaning to their random hookups and drunk rampages through use of astrological pseudoscience.
Omg last night I hooked up with my exe’s sister’s bestfriend’s brother after eating Olive Garden, and today my CoStar told me that “an adventurous pallet is key to a bold experience.” Like CoStar knows me too well
by Man Whore 6969 February 11, 2020
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Present participant of costar

Two friends who have a sexual realtionship without being emotionally involved.

The verb of having a friend with benefits

From the spanish root acostarnos, translates to "lets have sex"
Ilana and I are costarring
by Gabriel Martin April 06, 2013
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A portuguese verb that means to dock a port or to reach the seashore.
"Ele vai costar o navio para desembarcar o peixe." - he is going to dock the ship to unload the fish.
"O naufrago costou na Caparica." - The castaway has reached the seashore in Caparica.
by Costeiro July 17, 2018
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