The term 'Pipe Unclogger' refers to a job that requires the use of two products, LYE (3 letters) and Drano (5 letters). LYE is a caustic alkaline substance that can be used to dissolve clogs in pipes. Drano is a commercial product that contains LYE and other chemicals that can be used to unclog drains. Both products are effective at removing clogs from pipes and drains, but they should be used with caution as they can be hazardous if not handled properly.