Akon -- My Pet Tigers Poop A LOT!!

Akon's got a serious poop problem in his backyard ... 'cause his pet tigers are dumping like crazy ... and you won't believe how much scat they drop a week.

The "Smack That" singer was on his way into LAX when he told us he owns two tigers -- named Simba and Tony (clever) -- who drop some serious dookies.

Akon says he only cages his tigers at night ... and trusts Tony and Simba enough to let them roam his yard during the day.