The opposite of casual sex.

"Save-the-Date" cards are sent, followed by printed invitations requiring an RSVP. There is an unspoken dress and undress code. Invitees are expected to be well-mannered, witty, and clean. Afterwards, a small note of appreciation is well received.
An evening of formal sex was always something to look forward to, a reason to go shopping in the preceding weeks, to attend to hair, nails, makeup. And in the following days, to lightly mention in passing, a source of envy amongst friends.
by Monkey's Dad January 10, 2022
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when tom asks you to watch creed by sending a letter in the mail.
I'm just going to send emma a formal invite
by timmytimmynumnums May 8, 2016
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Rainbow formal is a dress code similar to black tie, where the attendees to the event (normally a ball or awards ceremony) are required to not wear the usual white shirt, with black tie, jacket and trousers and instead dress like a idiot in their stupid coloured jackets and shirts, while still trying to stop people turning up in jeans and a t shirt, or anything that doesn't look stupid.
"we organised an event and eschewed the usual black tie, instead choosing to dress like a bunch of tosspots in 'rainbow formal', while remaining smug and snobby by avoiding casual dress."
by a sensible person March 21, 2007
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Usually "formally correct" is being said by dickheads in suits...
I am a dickhead and I wear a formally correct suit.
by theRealDeal7446 July 22, 2011
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–noun

very formal usage in slang vocabulary or old school slang.
Conversion between Homies in formal slang:

H1) SON? to whom are you referening to?
H2) Dawg I is referening to you son... you and your bubba lookin lip..

------ol' skool slang----------

H1) Funky fresh kid... the car is bassin
by Nigga Name Nate September 12, 2007
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Due to the popularity of shows like Mad Men, games like L.A. Noire and a resurgence of overall classiness, and in part a rebellion against the hip-hop, grunge, "swag" culture of many high schoolers, Formal Fridays are a day for 20-somes and college students to dress in more formal attire, listen to big band and jazz music and sip straight liquor on the rocks.
Can't wait to wear this new skinny tie on Formal Fridays at the bar.
by DickWhitmanDonDraper January 13, 2013
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A slang term for a dress code prohibiting any apparel below the waist. Derived from a "Harold and Kumar" movie.
Macey loved to attend "semi formal" parties, especially when the place was packed tight.
by mrg4ce January 27, 2010
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