Functionally High 

When a person smokes enough marijuana to feel its effects, but not enough to alter competence at regular daily tasks or create a lasting low after the effects have worn off.

Becoming functionally high is a skill that comes naturally for some, and for others takes a long time to develop and master.

Person 1: I just got some killer bud from a friend of mine. Wanna smoke?

Person 2: Ok, but I have work in an hour. I guess I'll go in functionally high.

Functionally High by DJAlexxander September 8, 2011

functional high 

When you use a vape (mflb) to smoke bud and it hit's just right and you are able to go out and be high with people around, but no one notices.

Person: Dude how are you able to go out a be yourself and still be high?
Me: I use a (mflb) and it hit's just right, so it gives me a functional high.

functional high by Andy'sCandy October 9, 2016