Word used for a DJ/producer whose sets are insanely good, and will make you move to the max of your limits. Comes from the German DJ Kaufmann.
Can also be used on someone who's having a lot of fun doing what they love, for example, DJing. Again comes from the fun vibe of the German DJ Kaufmann when she's playing her sets.
Man, my playlist was so good today, it seemed like I was Kaufmann
Dude, you were having so much fun in the pool today, you were just kaufmann-ing it!