Dingleflip

(v.) to do a backflip and break your dingle in the process; to break an important organ or bone in your body while backflipping
(n.) a situation in which the victim's dingle (or other body part) is broken due to a backflip

(v.) I dingleflipped on the toilet yesterday, and broke my dingle.
(n.) Natalie had a dingleflip in gymnastics class yesterday!