That is featuring . as like `Amy Winehouse feat. Mos Def` : means Mos Def is joined her song or music. it is not always means joined to sing or rap, sometimes only for producing or another joint. refer to the `duet` duet means join to sing. it is same meaning as Collaboration. here is example of feating songs. Amy Winehouse feat. Mos Def/Love is Losing Game http://jp.youtube.com/watch?v=NLB-BmYDPw0 Wang LeeHom Feat. Selina http://jp.youtube.com/watch?v=iekoi_LIe7Y it is mainly used for music. but collaboration of fashion or entertainment as well. `LOUIS VUITTON feat. Kanya West` LOUIS VUITTON produce the fashion collaboraition Kanya West Hip-Hop style.

Chi's answer is perfect. +1

FT....is that faint? It means somebody can't understand your words or think it is weird. You can just say I faint. Means you couldn't believe his intelligence.