UMC

U Mad Corny (you're mad corny) the person you refer this to is silly, tried to tell a joke that failed, purposely does something to aggravate or please someone or purposely does something he/she knows will get a negative response.

girl: i miss you

boy: I miss you like a bee miss the flowers

girl: lol umc

ex2:
guy: dude you going partying later on?
guy2: nah ima play my new video game tonight

guy: umc