YouTube

1: An action of offensive and pointless stupidity; an individual who acts with offensive and pointless stupidity; a moment of offensive and pointless stupidity

2: An action of inoffensive and purposeful intelligence; an individual who acts with inoffensive and purposeful intelligence; a moment of inoffensive and purposeful intelligence

Example 1
Man 1: *Playing loud music on his phone while walking down the street*
Man 2: Hey turn the music down you YouTube!

Example 2
Man 1: Hey, you dropped your wallet, here you go.
Man 2: Aw thanks man, you're a real YouTube.