Sand in the potato salad
To mess something up royally, also used by the character Tito from the Nickelodeon show: Rocket Power.
Person 1: Where's my dog?
Person 2: I really got some sand in the potato salad, he escaped and is now loose.
Person 1: We better go looking for it.
Person 2: I really got some sand in the potato salad, he escaped and is now loose.
Person 1: We better go looking for it.