갑질이 · 갑질을
abuse of power over subordinates, high-handed treatment by someone in a superior position
Example
손님의 갑질 때문에 직원들이 많이 힘들어해요.
The staff are having a hard time because of customers who treat them like dirt.
Word parts
갑 party A
갑 is 'party A' (the stronger side) in contracts, plus -질, a suffix for disapproved actions.
Good to know
-질 often marks a disapproved action, as in 도둑질 (stealing) and 갑질.