Similar to "fucking up" But you're high while doing so.
Other forms: Baked up, baked as fuck! baking up big time.
Term can refer to any mishap caused mainly because you are high.
Ex: Falling, laughing uncontrollably, putting things away incorrectly or in the wrong area ( Milk in pantry), passing out, accidentally calling your parents. Leaving weed out, ect...
Friend 1: Dude I just found the air freshener in the fridge...
Friend 2: Hahahahaha Oh... Dude I'm baking up.
Friend 1: So dude, last night I ate some cereal when I was super baked and when I woke up this morning I had put the milk in the pantry and the cereal in the fridge! Man I baked up.
Friend 2: Yeah you did.