A character on the television show "It's Always Sunny in Philadelphia". An old high school classmate of the gang named Matthew Mara who was made fun of for his leg braces. He eventually becomes homeless as a result of the gang's antics. He has a crush on Sweet Dee is is often tormented by Dennis and Mac (e.g. - teabagging). On "Mac and Dennis: Manhunters", the two hunt Cricket as a form of game.
Mac: "You wanna teabag Rickety Cricket?"
Dennis: "Nah, we've been doing that since high school."
"crinkly dinker" describes someone or something that's needlessly complex, confusing, or inefficient. It could imply that the person or thing is causing unnecessary complications or difficulties due to their actions or attributes.
Despite his promises of efficiency, his approach to project management turned out to be a crinkly dinker, leading to unnecessary complications and delays.