To undersee something is to get out of that fugue state-of-mind and simply see something for what it is instead of, the inferior, understanding what's going on.
Dude 1: "... And that's how it all happened."
Dude 2: "Dude... DUDE!"
Dude 1: "Yeah?"
Dude 2: "Not only do I understand... I UNDERSEE IT!"
Dude 1: "Dude, that's wicked. Lets smoke a J."
Loose change and other items often found under or between furniture cushions (especially couches), automobile seats, and other such places where stuff falls out of your pockets and you usually can't find it without crawling on your hands and knees.
Origin: This is a common enough phenomenon that I decided there needed to be a term for it. It is a play on words from the phrase "undersea treasure".
College dude 1: “Man, I need a Mountain Dew for tonight’s cram session, but I spent my last quarters on the laundry machines…”
College dude 2: “Look around the dorm lounge, dude. There’s bound to be at least 50 cents in underseat treasure there…”
College dude 1: “Thanks, bro; I never thought of that!”
College dude 2: “That’s ‘cause you’re a pothead. Anyway, try to steer clear of the used condoms.”
To drive over the speed limit, but still more slowly than everyone else on the road.
Underspeed. Conjugate like any other verb. Jeff undersped the whole time we were in Israel, going 80 kph when the posted limit was 60 kph. Krishnan and I mocked him severely when even a bus passed us at about 100 kph.
When you and your friends are passing around a bong, and Y'all smoke the top layer of the weed. The Underweed is all the smokable weed under the burnt top layer in the bowl.