One who consistently exhibits stoner-like behaviors (i.e. eating jack in the crack at 2AM, skipping class, watching nature documentaries) even when they're in a sober state

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.

A woman who always looks stoned but is high on her lifestyle , by trying to be sober!

The same thing as sober except for marijuana. Meaning that you arent under the influence of the drug.
Stoned + Sober = Stober.

To act sober, in order to avoid trouble when you're actually either high, or drunk.

The state of being between stoned and sober.

When you are such a stoner that even when you are completely sober, you still look stoned.