A "schting" or "schtinger" is an undesirable event, or the exclaimation made upon observation of said event.
"He got kicked in the crotch, it was a real schtinger."
"She lost her phone"
When having sex, contact with the males fist into the females nose giving the female a bloody nose. After blood comes out, the males signs his name on the females chest.
"I gave that bitch a poor man's autograph."