The title typically refers to "Mina" or "Menina" (girl) in the context of many funk song titles or is used as shorthand for a specific artist moniker.
The song is titled and is a Brazilian Funk (Funk Carioca) track. MN - Rafael Moura & Rodrigo Weeh.mp4
and Rodrigo Weeh are both known within the Brazilian funk scene, often collaborating with various DJs and producers. The title typically refers to "Mina" or "Menina"
This specific video file likely features a musical collaboration or a "Good Feature" (special guest appearance) between the two. MN - Rafael Moura & Rodrigo Weeh.mp4