Literally "music, women, dogs, and horses"; refers to a dissipated life of luxury and sensual indulgence.

(idiom) to work like a dog or a horse for someone; used to express one's willingness to serve another loyally

To render one's humble services; to be at someone's beck and call.

loyal devotion; full-hearted loyalty; originally used to describe the humble loyalty of a subject to a monarch or official