2.To be experiencing euphoric intoxication through drugs.
Nerdy kid in math class: Woooo! I passed the test! Wooohoo, I'm so smart! *prances all over the classroom like a ninny*
Normal kid:(talking to a fellow classmate about the nerd) He sure is riding high, isn't he?
Cop: You know sir, you don't seem to realize that you are speeding and swerving a little on your side of the road.
TJ: Uh was I? Really? *giggles* No sir, I havn't drank any.
Cop: No you don't look drunk. I see you are shaking a bit and have that goofy grin on your face. You sure are feeling very happy right now aren't you.
TJ: Oooh yeah! I am RIDING HIGH!!
Cop: And you are fucking going to be riding in the back of my police car with me taking you on an up north trip! That is a bag of crack rock that I see on your dashboard! NOW GET OUT!
Caleb: Oh shit.
TJ: Here, have a donut. *pulls out a fresh Krispy Kreme donut and hands it to the cop*
Cop: Thanks. *scarfs down donut* But still, you are coming with me!
TJ and Caleb: Haaaahahahahaha!
Cop: *pulling TJ out* Now wha...