This is actually fairly common in rap, and the line b/w what I guess you could call "fair use homage" and "biting" isn't always clear. For example, Cam's diss track of Jay-Z "Swagger Jacker" consists of a medley of Jay-Z repeating other MC's lines. Although Jay is IMHO the best MC alive right now, I do think it's treading a thin line to constantly repeat bars from another rapper.
posted by joseph at 2007-05-04 14:01:06 
Another quick example: <a href="http://www.pitchforkmedia.com/article/download/42539-the-cool-kids-i-rock-and-88-stream" target="_blank">The Cool Kids' song "'88"</a> drops into some Men Without Hats.
posted by Ryan at 2007-05-06 16:41:16
Didn't mean to imply this was extremely unique... anyway, my favorite example: Lifter Puller's "Roaming The Foam," which strangely drops Guns 'n Roses and Salt 'n Pepper next to each other.
posted by Rex at 2007-05-06 16:54:06
There were actually two songs this year that quoted C.R.E.A.M.; Swizz Beatz "It's me Snitches" and DJ Khaleed "We Takin Over." Just saying.
posted by Chris at 2007-05-06 17:07:25
