conspirotheory 

A conspiracy theory

Ironic/sarcastic portmanteau

I am liking the conspirotheory that Donald Trump is a robot powered by internet comments.

conspirotheory by Stitcherella July 14, 2016

conspiratheory 

a theory of a conspiracy.. someone's random idea that cannot be proved

Also can be used as Conspiratist - someone who creates or believes in conspiratheories

Doob said that Obama was an alien in a black man's body.. I said Doob that is just a conspiratheory, don't be such a conspiratist.

conspiratheory by styballer February 10, 2010