Effect used in Jay-Z : 03 bonnie and clyde?

[Boss Authority]

Hey, I'm wondering what effect they used on the voice of Jay-Z in "03 Bonnie and Clyde" during the hook. They also used the same effect for the hook on that "Me and my girlfriend" track by 2Pac. What is it?

 

[x7productionz]

reverse, reverb, reverse it back.

 

[Bowl of weedies]

that song was whacko