A slur that is pure gibberish, but is an unintentional use of sounds by a drunk or high person that is moments away from vomiting.
It can also refer to a person jacking off.
"I'm so... I'm so... Is the world a teacup ride right now?... If Spudiddle were.. It could GRHHHH!!!!"
"Some dude on the bus yesterday was like spudiddling himself in plain view."