Diddy -- I Lost $1 Million ... And 'It Aint Nothin'

Diddy lost a MILLION DOLLARS shooting dice early this morning -- and the best part ... he didn't give two craps about it.

The frustrating video from Diddy's dice game was posted on Instagram a few hours ago -- where the rapper bragged about the loss being no sweat and added, "Suck My D**k B*tch."

Not surprisingly, the video irked many of his followers ... with one saying, "Such a blessing to have that much money. Imma keep my fingers cross and pray for a blessing that big to get me and my family off the streets."

Mo money, NO problems ... for Diddy.