“power dynamic” has got to be in the top 5. I encounter this often and when people use it they seem to exclusively mean “relationship in which there is an unjust imbalance of power”
Olúfẹ́mi O. Táíwòthere are a lot of philosophical concepts that get egregiously misused out of the seminar room (and in the seminar room, to be fair). but in terms of sheer pernicious misuse "social construct" has gotta be top 5 somewhere and it's not number 5