Kanye West got mad ... real mad (Joe Jackson) ... at a paparazzi in Miami last night ... after the snapper fired off some questions about Kim's ex-BF Reggie Bush.
Kanye and Kim Kardashian were leaving a dinner date in Miami Beach, when the photog -- NOT OURS -- shouted, "Kim did you know Reggie is here [in Miami] having dinner?"
The pap continued, "Did you wanna go congratulate him on his pregnancy?"
That's when Kanye snapped -- angrily rushing after the female pap after grasping for her camera -- but never actually striking the woman. Kim was smiling during the entire confrontation.
K&K then got into a waiting Rolls Royce Phantom and left the scene.
Afterward, the pap told other photogs, "Kanye West just tried to beat me up."
It definitely ain't the first time Kanye's gone crazy on a snapper -- trust us, we know ... 'cause he SMASHED THE HELL out of a TMZ camera at LAX back in 2008.