Someone who feels they must treat an escalator as a staircase, bringing guilt to the rest of the parties on the escalator, unless they also do so.
Jane: "Why is that girl bounding up the escalator like it's a flight of stairs? She's making the rest of us look lazy for just standing here riding it!"
Jill: "She's a total escalator overachiever."
by pseuzieq August 3, 2010
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A co-worker that lures you in to thinking that mediocrity is commonplace at the office. Just when you think you are both on the same page he or she will make look bad by putting together elite spreadsheets, cutting edge PowerPoints, and insightful talking points at meetings.
John: Where is Lindsay? She normally takes a 2 hour lunch with us?

Jim: Oh you didn't know? Turns out she is a closet overachiever.
by TR DUDE November 21, 2013
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One who should be in a higher position/class, but chooses not to be for the sake of easier work, social status/life, lower expectations, or just so they can feel dominant compared to their dumbed down fellow students/workers.
Michelle's such an overachieving underachiever, she should be in academic algebra, but chose applied algebra for easier work, and is now making the entire applied algebra class look stupid.

Diego chose to stay at the crappy Seneca college just because most of his friends are going to it, even though he was accepted by Harvard University.
by Hojin :P April 7, 2011
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When you don't try at all yet always seem to excel at everything.
"Devin got a hundred on his math exam without even studying! What an effortless overachiever."
by Nishinoya Yuu March 24, 2016
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a term used originally by Frau (westergard), and now by many Latin 2&3 students to describe the nerdy orientals, who do pretty much nothing but study, do homework, and study again, as opposed to the white nerds or the stoner and hip-hop asians.
James Ma is as much of an overachieving oriental as u'll ever meet, man.

if it wasnt for the overachieving orientals, our whole class would fail the regents.
by SomeYidBint November 13, 2007
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WHEN SOMEONE TRYS TO ACHIEVE SOMETHING AND THE OUTCOME IS GREATER THAN EVER EXPECTED OR (sometimes) EVEN DESERVED

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This kid overachieved at the ravioli contest. It does not deserve this.
by mellowww September 1, 2015
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