Riding motorcycles or quads around completely wasted. term comes from a brand of riding gear called Shift.
lets drink before we go riding, i want to go out shift-faced
af Papacav 14. maj 2010
1 more definition
(Adj) the act of being inebriated during your scheduled restaurant shift.
When she came in to work was fine, but by the end of the night she was shift faced.
af DJ McBojangles 6. marts 2015