Shift Blocking 

The act of a boss or manager scheduling you for certain shifts so that you avoid working along side someone you are trying to have sex with. Cock blocking you by giving you bad shifts.

Man, there's this new girl at work who is so hot! But I never work with her, my manager is always shift blocking me.

Shift Blocking by Shambles299 October 3, 2011

blockin' they shit 

When a guy tries to take over some other guys territory (girls, take over their drugs etc.)

We were over on the east side blockin' they shit all day.

blockin' they shit by connollyrobyn November 19, 2010