No, it's not Bigfoot -- it's the gorilla suit confiscated by police last month following a dangerous prank involving "Honey Boo Boo" star "Crazy" Tony Lindsey ... and now, Tony's demanding the suit back, insisting cops are overreacting about the whole thing.
TMZ broke the story ... Lindsey was arrested last month for taking part in a prank that involved a man scaring traffic alongside a Georgia highway ... in a gorilla suit.
Lindsey wasn't wearing the suit, but cops arrested him anyway for taking part in the stunt -- along with the other adults involved. Meanwhile, the gorilla suit was booked into evidence while police investigate the incident.
But Lindsey -- who loves the suit and uses it often to scare his buddies -- is pissed, telling TMZ, "It's wrong of them to keep my gorilla suit ... they're treating me like I killed somebody!"
Lindsey adds, the arresting officer "could have just told us all to knock it off and go home."
TMZ spoke with the Wilkinson County DA, who says the suit is part of an ongoing investigation and it can’t be released from evidence until the case is closed.