Okay, and now flip. Starting to flag here. Ooh, maybe I should have done flag…
Flip showed up in the late sixteenth century, meaning, and I’m totally serious here, to toss with the thumb or to fillip. Fillip. That’s an actual word. Apparently it means flicking your fingernail of your thumb. Wow. Okay. I just need to let that sink in there for a minute.
Anyway, it’s not really sure where it comes from before that. It could be from the word flap or the abovementioned fillip, and it’s obviously related to flip-flop in some way. Also, to be flip, like being a smartass, is actually the shortened form of flippant. So it’s not related to the other flip in anyway.
And that’s it. It doesn’t have any origins older than English, its origins aren’t certain, and the one origin that is definite (to be flip) isn’t related to the others.
Words, man. Words.