A roach clip dick is something that a narcissistic chauvinistic male has, and because of it, they are usually sexually insecure and dysfunctional because they put too much stock into their pathetically tiny malformed sexual organ. They seek to constantly cover up their shortcomings because they need tweezers to hold it to pee because their man is literally the size of a roach clip from a blunt.
Maybe he's being so shitty to the ladies because he got a "roach clip dick."