Usually used when someone is pissing you off or won't stop talking shite.
Literally means for someone to jump in the bin because their banter is terrible and needs to be put in the bin.
Can be abbreiviated to 'GITB' for text
Me: 'Mate Get In The Bin'
Me: 'Mate here's a riddle, if Torres took a shot at goal against David de Gea, would he score?'
Friend: 'Get In The Bin'