It's safe to say that the rivalry between Conor McGregor and Dustin Poirier is far from over after the former foes got into an exchange on social media.McGregor sent out a tweet in reaction to ESPN's Brett Okamoto's tweet regarding Poirier being hospitalized due to a staph infection. The former two-division UFC champion tweeted a short message directed at his rival, where he wrote:"Heal up soon scruffy knickers."Conor McGregor@TheNotoriousMMAHeal up soon scruffy knickers twitter.com/bokamotoespn/s…Brett Okamoto@bokamotoESPNSome context on Dustin Poirier’s (@DustinPoirier) IG posts about being hospitalized … told me it’s staph, but he’s not responding to antibiotics over the last 24 hours. Undergoing further blood work now, hopefully get some answers today.7025238Some context on Dustin Poirier’s (@DustinPoirier) IG posts about being hospitalized … told me it’s staph, but he’s not responding to antibiotics over the last 24 hours. Undergoing further blood work now, hopefully get some answers today.Heal up soon scruffy knickers twitter.com/bokamotoespn/s…'The Diamond' wasn't happy with that as he fired back with a hilarious pun involving PED allegations against the Irishman and his film career, tweeting:"You done filming Roid House and ready to get slapped around again!?"The Diamond@DustinPoirier@TheNotoriousMMA You done filming Roid House and ready to get slapped around again!?7199397@TheNotoriousMMA You done filming Roid House and ready to get slapped around again!?The timing is interesting because 'Mystic Mac' recently confirmed that he'll be back in the USADA testing pool in February. Meanwhile, Poirier is coming off a win against Michael Chandler in an absolute war and needs to heal up before making another run at the championship.Will the UFC book Conor McGregor vs. Dustin Poirier 4?UFC Canada@UFC_CANOBODY saw that Poirier vs McGregor ending coming How did you react??85588NOBODY saw that Poirier vs McGregor ending coming 😳How did you react?? https://t.co/g4UJ8xw6DOConor McGregor and Dustin Poirier might have unintentionally planted the seeds for the UFC to revisit their fight once again.It's very rare for a promotion to book a fight four times, but it's not entirely impossible. In fact, Brandon Moreno and UFC flyweight champion Deiveson Figueiredo are scheduled to fight each other for the fourth time at UFC 283 next month.The circumstances surrounding the trilogy between 'The Notorious' and 'The Diamond' are unique in that their most recent bout ended via doctor stoppage after the former two-division UFC champion was unable to continue. Prior to the trilogy bout, they both earned TKO wins against each other.The animosity and potential pay-per-view revenue for McGregor vs. Poirier 4 could be too enticing to pass up.During their Twitter exchange, 'Mystic Mac' even put Poirier on notice that he intends to fight him agian:"Ye I'm in Amderdam jacked like [Jean-Claude] van damn. You weren't just hurt pal. You were scared hurt don't forget it. I'm coming back to put you in a box. Full of it. I'm sending you off this earth. Permanent. Stay waiting for the road house as well pal you and the missus will love it."Conor McGregor@TheNotoriousMMA@DustinPoirier Ye I’m in Amsterdam jacked like van damn. You weren’t just hurt pal. You were scared hurt don’t forget it. I’m coming back to put you in a box. Full of it. I’m sending you off this earth. Permanent. Stay waiting for the road house as well pal you and the missus will love it5927369@DustinPoirier Ye I’m in Amsterdam jacked like van damn. You weren’t just hurt pal. You were scared hurt don’t forget it. I’m coming back to put you in a box. Full of it. I’m sending you off this earth. Permanent. Stay waiting for the road house as well pal you and the missus will love it