Tuus facies interficiat homines, et liberos coget clamare. --> Your face kills people and makes children scream.
Ab oscula. --> Kiss off.
Latin joke:
A Latin class is having a pop quiz, and one student is asked to write on the chalkboard the conjugation of the verb "to swim." He starts to get up and frantically whispers to the student next to him, "What's the word for 'to swim'?"
The other student shrugs and says, "Damned if I know."
So the student goes up to the board and writes:
Damnedifino
Damnedifinare
Damnedifinavi
Damnedifinatus