Iggy Azalea Blasts Nick Young After Accidental Dinner Reunion

Roughly 18 months after calling it quits ... Iggy Azalea and Nick Young came face-to-face at Craig's in L.A. on Sunday -- and it was definitely NOT sunshine and rainbows.

Swaggy (who plays for the Warriors) is in town to play the Lakers -- and stopped by his old stomping grounds for dinner. Just so happens, Iggy had arrived a few hours before and was still inside.

The two were only inside the restaurant together for a short while -- but afterward, Young broke it down for us ... and told us things are cordial.

In fact, he even gave us ADVICE on how to act when you run into your ex ... and it ain't half bad!

But, Iggy clearly didn't feel the same way -- because when a reporter claimed the two were on a "dinner date," Iggy unloaded on Twitter.

"Ryan Smith @ TheDailyMail i hope all your christmas gifts contain boxes of dried up chips of dog sh*t for trying to imply i would EVER, EVER have a dinner date with my ex who created a full human behind my back."

Remember, they broke up when it came out that Nick knocked up his ex-GF.

Iggy added, "The unfortunate thing about LA is there are not that many places people eat. You can be in the middle of one of the most important dinner meetings of your life; and randomly your ex and all his friends walk in the same place."