The act of slipping an object such as a pen or pencil in one's nose or ear as if no one else would notice. This is sometimesfollowed by smelling it or putting it in ones mouth.
Paul: "Did you see Stephen slip that pen up his nose during our 10:00 meeting? Talk about input."
Jimmy: "That was the deepest penciltration I've ever seen."
Derived from the adjective facetious which means "treating serious issues with deliberatelyinappropriate humor; flippant" penistious is treating any issues in a penis-like manner with deliberately acting like a dick.
That politician was really being penistious during the debate. It is very penistious to say 'it is what it is.'