If you act like a piece of garbage and you are embarrassing yourself at the same time.
Acting in such a manner so that you are an object of ridicule by other people nearby who are witnessing your foolish actions.
My friend was so drunk, he tried to punch someone in the face. He missed his target completely, lost his balance, fell on his face in the middle of the bar, and everyone there laughed at him including the kid he was trying to fight. He was extremely garbarrassing.
I can't believe you drunk dialed that 300 pound beast at 3 am! How garbarrassing were you last night?