unny Truckers Apparel & Gifts Co. Funny Trucker Apparel - Truck Driver Gifts for Trucking Dads. Are you a truck driver, Semi Truck Driver, Over the Road, Truckers Wife, End Dump Driver, Milk Truck Driver, Snow Plow Driver trucker who can still shift a manual transmission? Then this is a perfect tee for you or for a gift for any trucker. This funny trucker What Part of Shifting Don't You Understand truckers tee makes a great truck driver humor gift that only a real trucker will understand - Grab one today - makes a great Trucker humor gift idea!