Top Definition
a) The large shaft protruding from a steering gearbox that converts forward/rearward action into a side to side reciprocating action to actuate the steering linkage.

b) The pulsating erect cock of a horny truck mechanic.
a) It appears that the sector shaft is damaged from the wreck.

b) Horny girl-C'mon baby, give me the sector shaft.
by 782 February 03, 2011

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