Spinamajig 

A staple of playgrounds in poor areas, spinamajigs are circular and spin. They are often confused with merry-go-rounds by fucktards who imagine horses everywhere, however, they are completely different in every way.

Person 1: 'Hey, lets go ride the merry-go-round!'
Person 2: 'Do you see any fuckin horses? This is a spinamajig you asshat. '

Spinamajig by Coombop May 2, 2008

stingamajig 

Any kinds of things that are supposed to sting people. The word is deducted from thingamajig and may refer to insects such as bees or wasps for example.

'The Simpsons' Episode 20-8 "Burns and the Bees". Ralph: "Stingamajigs!" used as an alarming warning before a possible bee attack.

stingamajig by Rizzo the Rat December 27, 2010