uptanker Posted in U Best definition uptanker It is the comapnion to the drydocker. To rid a commode of its flushing water, and to then deficate in the tank on the rear of the commode. The janitor hates us after last night. They got both a drydocker and a uptanker. How satisfied are you with the definition? Looking for uptanker meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 37 times.