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.
Depending on the water pressure to your house, a running toilet can leak over 1 gallon of water per hour which adds up to 26 gallons per day. This is almost 1 unit of water a month and if left undiscovered, a running toilet can waste almost 13 units of water a year.