Shipping which goes beyond any logical view or standpoint and will (most definitely) never become canon due to a multitude of reasons like e.g two characters being in different universes or never interacting in canon.
Person A: "Did you know, Sonic the Hedgehog x Arthur Shelby is a thing?"
Person B: "more like crackshipping but k"
A ship so wild that whoever thought of that must be on high amounts of crack. Either characters that barely interacted or any random character x random character.
“yo have you heard about aradus x shadowmilk”
“is that supposed to be a crackship”
“yeah i have jackshit to do”
“oh”