Definitions of get off:

verb: enjoy in a sexual way
verb: be relieved of one's duties temporarily
verb: escape potentially unpleasant consequences; get away with a forbidden action
verb: cause to be acquitted; get off the hook; in a legal case
verb: deliver verbally
verb: leave a vehicle, aircraft, etc.
verb: transfer
verb: send via the postal service
verb: get out of quickly
verb: get high, stoned, or drugged
verb: get off (a horse)