The term 'Big Name in Blue Jeans' refers to the iconic clothing brand Levi's. Founded in 1853, Levi Strauss & Co. is one of the oldest and most recognizable brands in the world. The company is best known for its denim jeans, which have become a staple of American fashion. Levi's has been a leader in the denim industry for over 150 years, and its products are sold in more than 110 countries around the world.