Gad zukes
A loud, crazy cry you make when the person you thought was a nobody just gave you a super idea and you feel like an idiot for not seeing it sooner.
'Gad zukes!' I said when my neighbor told me how to fix my broken bike.
'Gad zukes!' I yelled when my friend told me he knew the password to the school computer.
'Gad zukes!' I shouted when my sister told me she had a crush on my crush.