Bodybuilder's bulges refer to the muscular protrusions that are developed through bodybuilding. BICEPS, which is a six letter word, is a muscle located in the upper arm and is often referred to as the 'bicep bulge'. Pecs, which is a four letter word, is a muscle located in the chest and is often referred to as the 'pec bulge'. Both of these muscles are developed through bodybuilding and are considered to be the most prominent bulges on a bodybuilder's physique.