In hols how did armpit get his name?

Armpit, a character from Louis Sachar's novel "Holes," gets his nickname because of his poor personal hygiene, particularly his habit of not showering regularly. This leads to an unpleasant odor that earns him the teasing moniker among his peers. Despite the unflattering name, Armpit is a loyal and supportive friend, showcasing a deeper character beyond the nickname.