M.O.P. is an American hip hop duo composed of East Coast rappers Billy Danze and Lil' Fame. After years of mostly underground success, they gained more mainstream recognition in 2000 with the song "Ante Up", which would become their biggest hit. The group has frequently collaborated with DJ Premier and is part of the Gang Starr Foundation. Fame sometimes produces under the moniker Fizzy Womack, and has produced tracks on every M.O.P. release since 1996's Firing Squad, as well as work for other artists including Kool G Rap, Teflon and Wu-Tang Clan.

"Ante Up (Robbing-Hoodz Theory)" (rendered on digital platforms as "Ante Up (Robbin Hoodz Theory)", and also simply known as "Ante Up") is a song by American hip hop duo M.O.P. from their fourth studio album Warriorz (2000). Seen as their breakthrough single, it was released in 2000 and reached number 7 on the UK Singles Chart. A remix of the song features Busta Rhymes, Remy Martin and Teflon. The remix CD includes an additional version which features Funkmaster Flex.