Someone stupid enough to try to pet the tigers at the zoo.
Coined by The Daily Show's John Oliver in the latter days of the 2008 U.S. presidential campaign, to define a certain percentage of the electorate too stupid to have decided on a candidate yet.
That jackass who jumped into the polar bear pool in the Berlin Zoo was lucky to get out alive! That tiger petter should have been ripped to shreds.
A person that is so stupid they would reach their hand into a Tiger's cage and attempt to pet it...and then try to sue the Zoo because the angry Tiger that was wrongfully taken from its home in Africa, bit off the Tiger Petters hand.
Little Billy cannot be that dumb, he tried to pet the pissed off tiger at the zoo...Tiger Petter for sure.