The phrase "a rap with" is correct and usable in written English.
It can be used when referring to a conversation or discussion that is informal or has a rhythmic quality, often associated with rap music or culture.
Example: "I had a rap with my friend about the latest trends in hip-hop."
Alternatives: "a chat with" or "a talk with".
Didn't you do a rap with some other actresses?
7.15 PM: Har Mar Superstar is doing a rap with Neon Neon in Ugg boots.
While an iPad could survive a rap with a hammer, put a nail under that hammer (or let Wolverine have at it) and the iPad will certainly take a beating.
It answers the Beatles' eclectic "White Album" with Prince's own tour of black music styles (from a skeletal, synthesized blues to a rap, with extended stops at James Brown, Sly and the Family Stone and Parliament-Funkadelic); it has black humor and nasty fantasies.
Meanwhile the Yorkshire-born gods, or God, beamed down on hundreds of people who turned up at the Cow and the Calf to for the Ilka Moor rejig, which also involves soldiers from the Yorkshire Regiment, a rap with Brian Blessed, soprano Lesley Garrett, the Grimethorpe Colliery Band, Fame Academy star Alistair Griffin and the Yorkshire choir Rock Up and Sing.
Oh, and Snoop Dog Snoop Lionn?) once did a rap with Mr. Rico.
I'm hard pressed to come up with a rap duo with better flow or vocabulary— who else rhymes "gratuitous" in a song about slinging blow?
Then, Safari and Tavakkoli-Moghaddam (2010) used a Memetic algorithm for an RAP problem with a choice of strategies.
Lucious hosts a gaggle of bloggers with his adopted protege, Freda Gatz, who wants initiates a rap beef with Hakeem.
The first half is a rap album with Denmark Vessey and occasional guests rapping over beats from Earl Sweatshirt and Knxwledge.
I just did a rap session with Snoop Dogg and a rap composition called "Rocket Experience".
