Acronym for Got To Jizz. A point in time when somebody has to leave a social gathering or chatroom to go masturbate. Used either on IM's or in real life.
In a chatroom...
Adam: 'Sorry man i g2jizzle its Thursday'
Dave: 'Its cool. see you tomorrow'
In a social gathering...
Adam: 'Hey man give me your iPhone, i g2jizzle'
Dave: 'Right now?'
Adam: 'Its Thursday man!'
Dave: 'Fine, but hurry'