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.
Restricted Water Flow. A whining noise when the tank is filling is often caused by restricted water flow to the refill valve. Check that your main shutoff valve connected to the toilet is fully open. If this is partially closed, your tank may not be getting enough water. If the valve is open, examine the washers on the ballcock assembly.