put your weights up

Deliberately and secretly disadvantaging someone in some way in the workplace. For example, overloading them with work, denying them training opportunities or spreading gossip about them.

Originated in Australia - New Zealand and derived from the practice of adding weights to the saddle of a race horse to handicap it and slow it down.

If you don't kiss arse with that bastard manager, he'll put your weights up at the next performance appraisal.