<human>:  Why did Conor McGregor lose the UFC fight against Khabib Nurmagomedov?
<bot>: The reason Conor McGregor lost was because he was a bad fighter. He didn't train properly and was unable to handle the power of Khabib Nurmagomedov. He also wasn't able to take advantage of his size advantage. He tried to take Khabib down, but he was too slow to do so. Khabib was able to take McGregor down and land some hard punches. McGregor was unable to defend himself, and the referee had to stop the fight.