A Gobbler is when a person lets their nuts hang out of the zipper on their pants, then runs around in front of people screaming, "Gobble, gobble, gobble!" This refers to the resemblance of a person's nut sack and a turkeys "snood" (The flap of skin that hangs over the turkey's beak).
(Pulls out nuts out and lets them hang out of pants) Hey, yall! Check out my Gobbler! Gobble, gobble, gobble!