a 'stickler for' proper etiquette
He's a 'stickler for' the rules.
an etiquette 'stickler'
(..) - Will you challenge it? - Ma, you can't look up words... ...in the dictionary. Dad, she's cheating. "Quo"? That's not a word. - You're such a stickler. - Well, put something down. You're taking minutes on this. So Uncle Mac and Artie, they're all coming here before the wedding? (..)1990 TvShow: Seinfeld Title: The Stakeout Season: 1 Episode 2