a hairstyle in which the sides and back are shaved and long hair is grown at the top of the head
Diago: When i put me hurr in a pony tail y'all can see my short hair
Manne: Ya Diago your undercut is tight
by Eric December 11, 2003
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to weaken, damage, or cause the failure of something; undermine:
Large drug cartels can undercut their smaller rivals.
by erudite fuck June 13, 2020
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A strategic move in racing to get past the car in front without actually overtaking it on track. The car behind will pit earlier, do a quick lap on fresh tyres and come out in front once the other car has pitted.
Commentator: 'Red Bull are pitting this lap, they might be trying to get the undercut on the Mercedes.'
by James Vowles May 13, 2021
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A hairstyle that has been in existance for quite awhile. now branded popular by the dubstep artist Skrillex. Many guys and girls have been randomly on whim deciding to shave one side of their head, do to its growing popularity in the dubstep crowd.

Sadly, only a handful of individuals can actually pull this hair-do off. Leaving a majority of the hip-crowd who think it looks cool thanks to the fame of a certain Sonny Moore, look fairly odd, or unattractive(including Skrillex himself).
Guy 1: Hey man, check out her undercut!

Guy 2: She looks like Skrillex!

Guy 1: We should do it too!
by MegTieFO October 29, 2011
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A very common sort of haircut worn by people with opinions. Often associated with bands like 36 Crazyfists, Avenged Sevenfold, and Dredg. Excessive use of undercuts in association with strumming of chords can cause sudden precipitation, even inside. See also dyess
That's just your opinion, undercuts are indeed common.
by Alex Bruni March 04, 2005
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/ˌəndərˈkət ˈsinˌdrōm/

noun
When a female with short hair, or an undercut, has obsessively loved a person who does not love them back.
1: Due to Kayleigh's recent actions, I believe she has Undercut Syndrome.

2: “Emma has been obsessing over Jack since spring, but since Jack doesn’t like her, these are major symptoms for Undercut Syndrome.
by faggeta_1966_ November 27, 2017
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