A bodybuilder is someone who engages in physical exercise to develop their muscles. Lou, Lats, ATLAS, ABS, LAT, Autoworker, REP, and Heman are all terms associated with bodybuilding. Lou stands for Lower Oblique Upper, Lats for Latissimus Dorsi, ATLAS for the shoulder muscle, ABS for Abdominal Muscles, LAT for Latissimus Dorsi, Autoworker for a person who works out with weights, REP for repetition, and Heman for a fictional character known for his muscular physique.