The form: 5 line poem, with a "AABBA" rhyme scheme...which just means the first two lines and the last line rhyme, and then there's middle couplet.
Here's an example I just penned...as a South Carolina native-- a state with governor troubles right now. 'Nough said, right?
The governor headed for the Appalachian Trail
But detoured for some Argentinian tail
Said the people, "We're strugglin'
No thanks to your snugglin' "
and ran him out on a rail