This is a pet peeve of mine as well. Another common one is when people cast "addict" as a verb and inflect it to create "addicting", seemingly unaware of the perfectly adequate "addictive".
According to the dictionary, these are all valid forms but I just find them irksome for some reason.
Mine is "performant" used to mean pretty much anything you want it to mean. It might mean "high performance" (this algorithm is performant - highly performant is even funnier) or "performs better" (more performant).
According to the dictionary, these are all valid forms but I just find them irksome for some reason.