Famous Trios include:

Harry, Ron, and Hermione(Harry Potter)

The Three Stooges

The Three Musketeers

The Cutie Mark Crusaders(MLP)-Apple Bloom, Sweetie Bell, and Scootaloo

The Bad Touch Trio(Hetalia)-Prussia, Spain, France

And others...
by WhatTheFluff February 11, 2012
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A group of 3 characters on a t.v. series
In the stranger things Netflix series mike and Lucas and Dustin make a good trio
by Kingsteveharrington5556666 October 02, 2019
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tri·o (tr)
n. pl. tri·os

1. Music
a. A composition for three voices or three instruments.
b. A group of three singers or three instrumentalists.
c. The middle, contrasting section of a minuet, scherzo, march, or various other forms.
2. A group of three.

3. A term used for a situation where a person has sexual intercourse with a set of three friends. For example, a boy who has sex with a group of three friends is said to have 'completed the trio'
"Did you hear about Tom? He porked Hannah Walker last night"

"Really? Does that mean......"

"Yeah, because he rooted Jenny,Zoe and now Hannah, he's completed the trio."

"He'll definitely have the bad aids now then"

"Yup"
by AlexTaylor_CP March 21, 2010
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group of three people. no more, no less.
Krystal, Lupe, And Kat are a trio
by Kat-Kit March 28, 2005
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insertion of penis and both testicles inside the vagina at the same time.
That bitch was so loose, i gave her the trio.
by Mr. Trio April 05, 2010
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