To beat someone so bad that their ass becomes a jiggling mass of gel hanging off their spine, allowing you to rip it off and place it in their hands as they collapse into a heap of excruciating pain. After the beaten person finishes convulsing, you place their severed posterior next to their lips so that it looks like they are kissing their own ass while posting hilarious videos to social media.
Getting completely, utterly and totally beaten, defeated and crushed at a game, challenge or debate. Often computer based. Can be extended through the phrase "... on a plate"
Used in the popular TV show "The Big Bang Theory" when Penny and Amy beat Sheldon and Leonard in Pictionary. 'Got Your Ass Handed To You' is a phrase to mean something along the lines of 'You Just Got Thrashed!"
Penny: I wonder where the phrase Got Your Ass Handed To You originated. Maybe it's from ancient Rome where they'd actually chop off someones ass and be like HERE! You know to appease the god Loseronius.. The god of LOSERS
Sheldon: ._.