The line comes from the build up to UFC 229 in October 2018, where Khabib Nurmagomedov defended his lightweight title against Conor McGregor in Las Vegas. During the ceremonial weigh in, Khabib addressed McGregor's loud supporters directly and promised to smash their boy the next night. He won by submission in the fourth round, which helped the quote live on far beyond the event. Clips of the moment were shared across sports pages and later reused as a meme taunt whenever an underdog or confident fighter talks down an opponent.