Top Definition
1. Phrase used to refer to the actions of children who are over-tired and have a complete emotional meltdown. Parents can see this coming and know that the the only remedy for this is sleep.

2. This phrase can also be used as an effective trash-talking barb.
1. My wife and I were in pizza hut with our three-year old daughter. While waiting fifteen minutes for the waitress, a nearby baby began to cry. Our child said, "That baby is so sad..." and began sobbing. Lights Out Meatball (Lomb). (We left the restaurant.)

2. You beat your brother in any game. As the buzzer sounds, you lean over and scream, "Lights Out Meatball!" in his ear.
by Papa Dupes November 08, 2010

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