There are two bands with this name.

1> An eclectic band from Brooklyn, NY most often categorized as "funk", though their influences range from rock, blues, jazz, and African and Latin music as well. Their early albums (Mandrill, Mandrill Is, Composite Truth, Just Outside Of Town, and Mandrilland) are sometimes wild and experimental and sometimes danceable and fun, often times both at once. Their approach is somewhat comparable to early Funkadelic. Like Funkadelic, by their 1975 album called Solid they had settled into a smoother, more traditional funk sound, losing much but not all of their progressive edge.

2> Croatian band "ManDrill" started their version of alternative-funk in 1997. In 1998. they won an unsigned band contest "Ri Rock", and started gigging frequently. ManDrill music changed through the years and document of that is debut album "Embryo" (2002).
It wasn't just the music, the lineup also changed. The new crew started partying and recording new songs. During the sessions, bassist Roby and guitarist Tomy had a disastrous car accident. After a year-long recovery ManDrill are back in the studio.
Finally album "P" is released in 2006. and the band is playing loud again!
Band Members: Kristian Coza - Vocals, Tomislav Radinovic - Guitars, Robert Jovanovic - Bass, Dalibor Persic - Drums

Influences: Red Hot Chili Peppers, Depeche Mode, Tricky, Rage Against The Machine, Massive Attack