Golfers around the world have Scotland to thank for inventing this great game, but the term “birdie” is actually an all-American term. Specifically, Atlantic City Country Club is where the fluttery phrase for shooting one under par came to be—and boy, do they let you know about it.
In any event, the term “birdie” was coined, which, according to Price was an “abomination in the eyes of the British.” And more than a century later, like bird poop to the windshield of my car every time I park outside, it has stuck.
Source: GolfDigest