Definition of gear:
(n) :
equipment or paraphernalia, especially that used for an athletic endeavor; a wheel with grooves (
teeth) engraved on the outer circumference, such that two such devices can interlock and convey motion from one to the other
(v) :
to fit with gears in order to achieve a desired gear ratio
(interjection) :
(mostly British (Scouse?)) great or fantastic