To be the worst ref in the world in your respective sport. Coined after a horrendous job in the 2-2 tie between the United States and Slovenia in the World Cup, which included a "hand" ball off the neck, constant bad foul calls, and a goal taken away with under five minutes left.
Fan A: Wow, that ref was bad.
Fan B: Yeah, but he's no Koman Coulibaly.
Fan A: Touche
The world's worst referee. He decided he hates Americans so screwed us out of three points, on a horrible call. He didn't even make a call. He just blew a whistle. While, four US players were being held by the Slovenians. Great call dumb ass.
To disallow a game-winning goal by calling a foul where none occurred.
Coulibaly became a household name in the US after Mali referee Koman Coulibaly disallowed Maurice Edu's game-winning goal in the 86th minute of the US-Slovenia match in the 2010 FIFA World Cup.
To perform a critical analysis of an event , in real time, with poor accuracy or judgment (or "judgEment" if you are British). Refusal to discuss or deliberate on the issue afterward is a common complementary course taken. Thought to have originated with FIFA referee Koman Coulibaly serving a "phantom" foul to the United States in the 2010 FIFA World Cup during a group stage match against Slovenia.
Koman Coulibaly definitely just coulibalied that "decision." The US threw rock and Slovenia threw scissors. Only a coulibaly could miss that; US wins.