When I was a kid, collecting and trading baseball and hockey cards was popular among boys. In the schoolyard, there would often be one boy shuffling through his collection, and one or two potential traders watching carefully, and, as the cards were briefly shown, saying, "Got it - got it - got it" - until, eventually, "Don't got it!", at which point a trade might be considered.

I don't recall our teachers ever trying to enforce it, but there was a discouragement of 'get/got' in the old grammar/usage/style guides. It seemed to be considered vulgar, perhaps in part because of its Biblical sense.