A sepera, according to the website Urban Dictionary, is: "1) a mischievous genius or militant womanizer; or 2) a serpent-like man, one who is wise and crafty." The definition goes on to say: "A Sepera is someone who is a Rebel against the systems of the world, although he seems to Master it and use the system to his personal individual advantage. Sepera does not know how to make the world better, but he knows how to get the best out of it." Darlene Love seems to have been defending a certain sepera when she sang:
He's a rebel and he'll never be any good,
He's a rebel 'cause he never ever does what he should,
But just because he doesn't do what everybody else does,
That's no reason why I can't give him all my love,
He's always good to me, always treats me tenderly,
'Cause he's not a rebel, no no no,
He's not a rebel, no no no, to me. . .
OhioLINK returns 201 hits on Sepera*, making it an exceedingly common typo or, more likely, an intentionally typed spelling error. Which are two separate things. (As Urban Dictionary puts it: "Too many ignorami spell SEPARATE as seperate.") So save your rebellion for some "militant womanizing" after work and, until then, let's try and separate the leader from the OPAC.
(Darlene Love and Phil Spector, from the website Pantheon Songs: Songs That Transcend Classic Status.)