used when you are half-kidding but also half-serious about the previous statement, possibly depending on whether the other person reacts seriously or jokingly.
*deciding what to watch on netflix* "They just added the Lizzie McGuire Movie, we could pretend we're 12 again and watch that. Hahaha.. corner..." "Wait yeah, I'm down."
"I wish I could drop of school and disappear from society sometimes. LOL corner though."
Someone who is boring, a let down, or doing/being something stupid. You can call someone a corner who is also acting annoying or is a loser. A broad term for someone who you don't like, however it could describe someone who is a goof or silly.
Good god, Jerry is straight fumbs down the slope, what a corner.
Dude I love Tommy so much, he's an absolute corner.