Grumpy is a dwarf in the Shrek franchise. He is based on Grumpy from Disney's Snow White and the Seven Dwarfs, as well as being based loosely on one of the dwarfs from the fairytale, Snow White and a loose allusion to the Prince from The Princess and the Pea.
He is the father of Lord Farquaad.
In the musical, it was revealed that he married Princess Pea of Duloc, who left her throne to marry him. They eventually had a son which they named Farquaad. Sometime during Farquaad's early childhood, Pea died when she fell from the top mattress of their bed, leaving Grumpy to raise Farquaad.
Farquaad claimed that his father had abandoned him in the woods as a child. However, when the fairytale characters brought Grumpy to his son's wedding, he reveals that he kicked Farquaad out because he was twenty-eight years old and living in his basement.
Snow White gave him away as a baby shower gift to be a nanny to Fiona's newborn babies. He does the cleaning, feeding, and, as he says, the "burping". He later appears at the end of the movie ringing the doorbell of Shrek's house, saying that he was here to babysit, prompting Shrek to stick a bottle in his mouth and slam the door shut in his face.