A term usually expressed when having sex with a "dog ugly" member of the opposite sex. Could also be used when slapping uglies with a PAT. “Lights out” is normally substituted for a lack of beer goggles.
Brian had to go "lights out" when he tagged PAT.
by Woody Johnson November 22, 2006

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Top Definition
When two balls are shot into the last remaining cup in a game of beer-pong, eliminating the chance of an opponent rebuttal
G1 "why didn't you take your rebuttal shots?"

G2 "Conner and Ipp just went lights out on us."

G1 " HaHa...you guys got fucked"
by buckkkkk April 23, 2009

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In sports, it means great performance.
"Maddux was lights out on the road, winning 8 of his last 9 decisions."
by erotica69 September 17, 2005

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To knock somebody out
*POW* Lights out mother fucker !
by ErikTheBeast February 23, 2006

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1. bedtime

2. time to die
Lights out little one. Its time to go to sleep.
by Light Joker February 10, 2007

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Sudden unexpected death
Did you hear about the dude that dropped dead while running a marathon? His heart fucking exploded and it was lights out right in the middle of the course! People had to run around the body for over 10 minutes until they tarped the corpse.
by Wordmaster Adam December 23, 2016

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It is a time from the morning to the evening when street lights must be out because the sun shines all daytime.
"Lights out!", commanded early morning the chief of the town and a electrician switched the lights off there.
by wwvvw February 28, 2009

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When somebody drops a deuce and the fan is connected to the light switch. the switch is turned off when they leave. the stink permiates until a victim walks in to use it.
Hey bro don't go in there. It's lights out.
by steverxl January 14, 2009

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