To furiously masturbate.
Tom: I love to masturbate.
Bill: Me too!! I ThunderUp every day!
Thunder up is the term used when the Oklahoma city thunder basketball team gives an ass whooping to other teams.
Thunder up on the Los Angeles Lakers tonight!
The act of OKC Thunder b-ball raising to the call and beating a better team.
OKC is going to Thunder up on Dallas in the last game on home court.
(V): The act of adding decorations specific to the Oklahoma City Thunder NBA team to anything and everything as a way to show how pumped up you are for the team. Basically making anything Thunder-ized.
James: Did you see that building with a beard?
Kevin: Yeah, they Thundered Up that building.
Serge: The whole state of Oklahoma is Thundering Up!
Thabo: I know, I can't go anywhere without seeing people dressed in orange and blue, street art, flags and banners.
Russell: We need to Thunder Up for the big game.
Kendrick: Yeah, we should buy lots of Thunder stuff and wear it and put it everywhere.
Slang for "furious masturbation."
I've got my tissues, a brand new bottle of Jergens, reruns of "Charles in Charge" on DVD...now it's time to THUNDER UP!