A term coined by Twitter in 2018 and later adopted by stan twitter and egirl culture. It’s used as an explanation for some dumb shit a homie might’ve done. A variation on dumb bitch juice.
“Damn, Osvaldo really messed up on November 11th”
“He literally drank dumbfuck juice”
The juice that you drink when you want to be a dumbfuck.
Oh no, did John drink the dumbfuck juice again? He's acting super weird with that cup of juice.