Itâs a phrase thatâs used to describe when youâre temporarily out of action due to illness or injury or a disability.
Basically itâs a stste of being disabled or being forced to lay low, again because of sickness or injury & youâre either in the hospital or confined to your bed at home.
âHey man! Howâs your brother?â âYo, heâs laid up in the hospital.â âWHAT?! What happened?â âCar accident man.â âOh dude, sorry! Give him my best.â