50 Cent is not one to let an insult slide.

For example, when Conor McGregor called Fif out last night during the Brooklyn stop of the Mayweather-McGregor promotional tour, Fif was on Instagram and striking back in an instant.

[Related: Conor McGregor calls out 50 Cent; Fif quickly responds.]

50 also happened to be on Jimmy Kimmel last night. In a pre-recorded segment, the 42-year-old confronted people who gave negative opinions of him to Kimmel's cameraman.

Little did the people know, 50 was standing right behind them.

In addition to that fun, Fif talked to Kimmel about how he helped to facilitate the Mayweather-McGregor fight, and explained the famous money phone photo he took with Mayweather.