A fork of Rural Dictionary
The face of someone who is not actually ugly at all, but who acts despicably in public.
I was checking up on my boyfriend online and saw his ugly mug looking back at me from his new profile on match.com.
Giving someone a dirty look. Looking at someone like you're mad at them.
I haven't done nothing to you....... why you be ugly muggin' me?
A face that is undisputedly ugly and resembles that of a mug or cup.
"You are an ugly mug.. and that is just a normal mug."
Someone who’s really fucking ugly
That guy named Jet is an ugly mug