Precision Approach Path Indicator - Used in avionics to guide planes to the runway using the approach path (Glide Path).
A series of 3 or 4 lights that change colour from white to red in accordance to the height of the aircraft.

Red over Red - Too low
Red over White - On the Glide path
White over White - Too high

The PAPI lights can be seen up to 5 miles in daylight and upto 20 miles at night.
The PAPI system will help us find the runway

Red over Red - You'll soon bang your head
Red over White - You'll be allright
White over White - You'll be out of sight
by Flight Lieutenant Bilbo June 29, 2009
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Papi means “Daddy” in Spanish, but can be used as pet names for a sexually active partner or a nickname.
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by @NiggaGotBigCocks May 19, 2019
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Another word for dad, daddy, father and other dad names.
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by Female Owl August 29, 2017
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A very sexy man, usually 25-35, Ladies' man..
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Your daddy that you sleep with ;)
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by daddy, fuck, sex, cum December 30, 2017
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PAPI - aviation term meaning Precision Approach Path Indicator. A set of four lights to the side of a runway set on the glideslope. If they are shining 4 red, you are two low. 2 red to white, you are just right. 2 white means you are too high.
We're coming down right on the PAPI.
by ImThePilot May 26, 2015
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The man of your dreams. He's stubborn and handsome. He looks extra good with a fro. His arms will hold you like you've never been held before. He is patient, gentle, and gracious. Full of determination and very smart. His eyes are like rainbows. He values family. He's outgoing and fun to be around. He has heart. He'll take your breath away when he sings. He cares for people. And last but not least, his legs may not work.. but everyone knows it doesn't take anything away from his value. People know him and adore him, and look up to him for inspriration. The Big Man upstairs was showing of when He made him.
I am the luckiest girl alive to have my Papi.
by cruzsr91 September 15, 2011
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