Pendejo is a vulgar Spanish-language term of abuse. To call a person a pendejo is essentially to call him stupid, although it also carries implications of wilful stubbornness and rank ineptitude.
A toilet may run periodically due to a problem with the flapper, the flapper seal, the flapper chain or a high float.
1 See TOILET FLUSHES POORLY to diagnose and fix slow-flushing toilets caused by inadequate water volume in the toilet bowl or in the toilet tank or cistern, or caused by a partly-blocked drain, defective vent.