You constantly put down unstylish things that they think are "stylish"
Boy, was your buddy excited when he got that bowtie from Nordstroms. He doesn't know the brand, but it has pink in it and you think pink is cool because it's fashion-forward, right? Wrong. You disapprove of it, especially when worn with a polo shirt and suspenders. You let him know you're disappointed in his decision, pat him on the back and tell him to go change. You don't think twice of turning down their hideous mistake, but you've cut him. Deep. And soon you will pay.