Backwards thunderthumb
When someone sticks their thumb backwards in your butthole and they fart on your thumb...thus the thunder sound.
I totally want to give Miley Cyrus a backwards thunderthumb.
thunderthumbing
thunderthumbing the art of scwhhhiiiinging ur thumb in a crane like manner directly aimed at ur partners bum bum hole to create panic and disturbance hahahaha
i chased him with my thunderthumb seeking his butthole ...thunderthumbing