[I]f you’re tempted to use it you should remember that if the Big Four networks don’t interrupt your regularly scheduled programming to tell you about it, it’s probably not epic.
Then there’s Epic Records, founded in 1953, mostly as a drain for recordings Columbia didn’t want to release on its own but didn’t want anyone else to get. (I blame Mitch Miller.) If I remember correctly, originally Columbia didn’t even bother to distribute Epic, which had to rely on independent distributors to get its product into the stores. Epic’s poor-relation status ended in the 1960s when it became a major vendor of British Invasion imports; Epic album 38112, issued in 1982, has outsold every other record on the face of the earth. At the time, it was indisputably epic. Today, maybe not so much.
Addendum: See also here.