Adjective.

The act of being very lame or annoying. Also sometimes associated with an asshole.
Dude, Hallowe'en was really rosier this year.
by Plazmotech November 02, 2015
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The lady next to Grindelwald in Fantastic Beasts. She has a lovely hat. Did I mention she has a lovely hat?
Vinda Rosier loves her hat.
by Morticiasplant November 03, 2019
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The act of being lame as absolute fuck. Seemingly impossible to fail so colossally hard at a certain task / time.
Mike: Dude what are we gonna do tonight?
Tanner: Not sure bro, every second this night is becoming even more rosier than the second before.

Lisa: Mom I got arrested come pick me up
Mom: Lol Lisa that's rosier af , you can wait it out cause I'm out on a date.
by Urban Tango Classes November 02, 2015
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