The act of being discovered while you are masturbating. This usually leads to pure humiliation, especially if the discoverer is a celebrity.
"Chase Rodrigue masturbated in his mom's truck when she went out to buy some groceries. However, our local weatherman caught him masturbating."
Being made to feel shame and humiliation for something that every one else does.
Jill was caught masturbating in her dorm room, and her friends will never let her forget about it.