docpop, (edited ) 
Jay-Z's "My First Song" is in 3/4, right?
Jay's flow is in triplets, but when I try to count the beat I feel a 4/4 sometimes and a 3/4 others.
I don't know much about music theory and time signatures, so help me understand this. https://www.youtube.com/watch?v=colv2Wy2q7E