Dustin Poirier recently harked back to an insult hurled at him by Conor McGregor in the build-up to UFC 178. During a recent Twitter Q&A session, 'The Diamond' reminded fans of his "cousin Cletus."Check out Dustin Poirier's hilarious dig at Conor McGregor below:The Diamond@DustinPoirierProbably my cousin Cletus twitter.com/uvray_/status/…u.v.ray@uvray_@DustinPoirier I can't remember who said: "Most people miss their opportunity because it comes dressed in overalls and looks like hard work."9:27 AM · Sep 20, 202148220@DustinPoirier I can't remember who said: "Most people miss their opportunity because it comes dressed in overalls and looks like hard work."1:49 AM · Oct 11, 2018Probably my cousin Cletus twitter.com/uvray_/status/…During the UFC 178 pre-fight press conference, Conor McGregor was asked to give his thoughts on Dustin Poirier. 'The Notorious' mocked Poirier's country background, calling the Louisiana native a "hillbilly." McGregor further went on to say that Dustin grew up in a circus and probably had a cousin named Cletus."Look, don't get me wrong, I like the kid. He is a quiet little hillbilly from the back ar*e of nowhere. You know, I have nothing against the guy, you know what I mean. I'm sure he grew up in a circus or a fair or, you know, he is a nice little kid. Cletus, you know. His cousin is probably named Cletus or something. I don't know. He is a nice kid," said Conor McGregor.Watch the entire pre-fight press conference below:The Irishman's brash promotional tactics evidently worked wonders. He was able to TKO Poirier in the first frame of their bout. Even 'The Diamond' admitted to getting enraged by McGregor's loud-mouthed persona in the lead-up to their first encounter. In an interview with ESPN in January, Poirier said:"But I don’t play a whole lot into that type of stuff. Like I said, that’s just noise. And I don’t want to waste energy on that stuff and get back into thinking all angry and emotional.” Conor McGregor and Dustin Poirier could lock horns for a fourth timeConor McGregor snapped his left leg in the first round of the UFC 264 main event. The injury resulted in Poirier winning the trilogy bout by way of a doctor's stoppage.ESPN MMA@espnmmaAn injury to Conor McGregor's leg forced a Doctor's Stoppage in the #UFC264 main event.Dustin Poirier won via TKO.10:02 AM · Jul 11, 202185842149An injury to Conor McGregor's leg forced a Doctor's Stoppage in the #UFC264 main event.Dustin Poirier won via TKO. https://t.co/jsZVltGniIThe inconclusive end to the third fight certainly warrants a fourth bout in order to bring a decisive end to their epic rivalry. During the UFC 264 press conference, UFC president Dana White said that the two gladiators will trade shots down the line again after McGregor makes his recovery.Chamatkar Sandhu@SandhuMMADana White just said a 4th fight between Dustin Poirier and Conor McGregor will happen when McGregor has recovered from his injury. He goes into surgery tomorrow. #UFC26410:35 AM · Jul 11, 202166471083Dana White just said a 4th fight between Dustin Poirier and Conor McGregor will happen when McGregor has recovered from his injury. He goes into surgery tomorrow. #UFC264