fine sir Share definition Flag A polite expression of respect for a gentleman who hath spoken kindly, used to balance gratitude and decorum, for when ‘thanks’ feeleth too plain "why thank you, fine sir." (english or australian accent for maximum effect. fine sir by chulitaaa October 24, 2025 0 0 Get merch Get the fine sir mug. Buy Now — $32.95 See more merch