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.
There are a few reasons this can happen. One, the water level in the tank is not adjusted correctly. Two, the water inlet holes in the bowl are partially clogged, thus slowing down the release of water from the tank. Three, the toilet is partially clogged and only allowing the water to drain out slowly.