When a potato chip breaks off when being dipped in the chip dip, leaving the broken chip to sink to the bottom of the dip. Like a "ship wreck" but with a chip instead.
Man, whose chip wreck is that the dip?" or "Man, I just had a chip wreck!" or "Watch out for the chip wrecks!
Objects that are always in motion. Object that are not in motion are stationary. Objects that are always in motion are motionary.
The exaust fan in the men's washroom is always on, in fact, its motionary.