Beshingamist
Pronunciation: Be·shing·a·mist [be-shing-uh-mist] noun
Definition: A person who annoys or irritates his or her siblings in order to provoke a response.
Example: "Louie, stop being such a beshingamist to your sisters!"
Uses: Usually used to describe a bored sibling who, for want of anything good to watch on the telly, decides to wind up his sisters in order to induce an uncontrollable rage. See also Beshingamism.
Origin: First known use of the word was by Louie William Scott in August 2011 whilst on holiday with this family. Louie was accused of annoying his siblings; in frustration his parents accused him of being annoying, to which he replied that he was simply being a beshingamist