Dictionary
Words, grammatical forms and meanings linked to the ontology.
don't be that guy en · X
Meanings
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(colloquial, imperative, informal) Used to caution someone against behavior seen as obnoxious, inconsiderate, or socially inappropriate.
This, I thought, is a sign. This is someone telling me something. Don't be that guy', Jeff. Stop now.
1998, Golden Empire Publications (publisher), Computer Gaming World - Volumes 162-164:"Maybe I'm the guy not to be. Maybe that's my value to this team ... Don't be that guy.
1997, Scott Fowler, Charles Elliott Chandler, The Year of the Cat, page 144:He was waving to the crowd and he plowed into another car in the pits. I just kept thinking, "Don't be that guy."
2001, Hearst Magazines (publisher), Popular Mechanics - Nov 2001, page 54:Don't be that guy, by the way.
2017, Cassie Leigh, You Have a Date, Don't F It Up:All too often, trolls (and even guys in general) think that dinner and drinks are the price of admission into a TGirl's pants. Don't be that guy. Be a gentleman.
2016, Michael David Freel, Trans-Oriented - A Guide to Love and Relationships for Men who Love Transsexual Women, page 135: