Cowboy Moniker is a term used to describe the nicknames of cowboys, which often reflect their personalities or physical characteristics. Tex is a 3 letter nickname that is derived from the word 'TEXTILE' and is often used to describe someone who is well-dressed. Ratso is a 5 letter nickname that is derived from the word 'RAT' and is often used to describe someone who is sly or sneaky. SLIM is a 4 letter nickname that is derived from the word 'SLENDER' and is often used to describe someone who is thin or lanky.