epar!, excl. — Green’s Dictionary of Slang

epar! excl.

[reverse of SE rape! used fig.]

(US campus) a cry of distress used ironically.

1958		J. Davis College Vocab. 11: Epar—Rape spelled backwards; a popular cry at parties when gentlemen get too fresh [HDAS].
1968–70		Current Sl. III–IV (Cumulative Issue) 43: Epar, n. (Rape spelled backwards—used as a cry of distress when one doesn’t really want help).