A person who enjoys living during the late night hours. A nighttimer isn't necessarily an insomniac; they simply prefer the time of day when it's dark and everyone else is asleep.
My roommate, the nighttimer, cooked a five-course meal at 3 am last night.
by The Nighttimer Society September 15, 2011
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nighttiming-

-the concept of going out on the town with 1+ persons and enjoying yourselves in a variety of classy ways throughout the night time.

-term popularized through the song "Nighttiming" by Coconut Records
Madeline: Hey benny!
Benny: Yes Madeline?
Madeline: Wanna go Nighttiming with Fred and I?
Benny: Oh, why yes! I would absolutely LOVE to!
Madeline: splendiferous!
by lindsay@theshore March 27, 2007
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When you get a little bit loopy/high past 12:00 pm and your super hyper and it's the prime time to have good laughs with a friend.
Let's hang out while we have the nighttime vibes.
by Illuminatihotti666 December 11, 2016
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A typically white male who walks around at night and is usually a prostitute
That guy is a nighttime walker.
by 🇺🇸 March 15, 2018
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When you stay up until around 3am or more in the morning and can't think straight and saying random things.
It was 4am in the morning and I was on a nighttime high so I started saying random stuff.
by Zongy January 5, 2009
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Ray Ban or Persol clear-lensed glasses worn with or without a prescription. Typically at night. Created in 1952, the glasses became popular among various Hollywood celebs. Today, young party-goers, also known as "scenesters" usually wear them when out on the town or in dark bars. When worn, these glasses make the individual look somewhat knowledgeable, stylish, and industry-savvy. Buddy Holly and Woody Allen are known for sporting these clear-lensed glasses.

"Look at the plethora of nighttime wayfarers at the dark bar! There is no way so many kids could need prescription glasses!"
by Katie Capri August 19, 2008
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Nighttime Self is that person who will drink all night, smoke weed, chase dubious women and get into some crazy shit. Nighttime self does not give a crap what the consequences are to morning self.
Dude 1 at 4am – Let’s do tequila shots off of those strippers and then get 2 more buckets of beer.
Dude 2 – Hey, aren’t you worried about that big meeting we have with the boss at 8am?
Dude 1 – Fuck man – this is Nighttime self you are talking to, I don’t give a shit about morning self.
Dude 2 - Ya, what am I talking about, fuck the meeting.
by lampertc September 27, 2013
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