(n./adj.) This phrase can be used to describe people that routinely bring up high school when they are well into their 30's, because they haven't had a single exciting or interesting experience since their senior year, and as such their lives and themselves are said to have, "peaked in high school."

This term is often used when speaking disparagingly about an individual or group. This phrase can only be used appropriately after-the-fact (i.e. after individual/group leaves high school) to accurately gauge if (s)he qualifies for such status.
I have noticed a lot of athletes, clowns, and bullies peaked in high school, whereas geeks, nerds, and dweebs are often at the lowest risk of 'peaking', because their high school experience(s) leave them no where to go but up.
by Brigadumb July 1, 2007
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Colin Coster is the only person who posts in the class of '13 Facebook page because he peaked in High School.
by Mad shade December 16, 2016
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A person who obtains the following traits:
1. Went to the closest college possible. Probably a D2 school with crappy athletics.

2. Their social media pictures are still of them playing high school sports.

3. They never leave the small town they went to high school in.

4. They never became anything more than the asshat they were in high school.

5. Probably won’t show up to your class reunion out of embarrassment.

6. 8/10 chance he was a fuckboy in high school.
Chad is such a loser now. We call that peaking in high school kids. Don’t be Chad.”
by Roastmaster996 November 26, 2017
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This phrase is used to describe people who reached their maximum potential in high school. People who peaked in high school were the "coolest, most athletic, prettiest" they ever were or will ever be.
I can't believe she's a bum, Mia Baroni was a prime example of someone who peaked in high school.
by John Raviolionson May 12, 2022
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A high school in Highland, Utah. Know for being full of rich snobs/jerks who look down on anyone not wearing something jewel encrusted.
Dude, those guys over there are complaining about how the ref took their bribe and has barely been favoring them, I bet they are from Lone Peak high school
by AF #1 October 12, 2010
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