Fetty Wap -- Makes it Rain in the Mall

Fetty Wap made it a lot easier for some lucky mall rats to do their Xmas shopping ... because he made it rain in that bitch.

Fetty and his Remy Boyz were strolling through Garden State Plaza in New Jersey Saturday when money started cascading down from the balcony.

Check out the video closely ... it seems Fetty is still recovering from his gnarly motorcycle accident ... it seems like his limping along.