Arch nemesis are friends from a long time ago that have more or less equivalent powers, but also have oposing ideologies. They are therefore always fighting with each other. Examples:
- Obi Wan and Darth Vader
- The Republican and Democratic Parties
Professor Xavier and Magneto are eachother's arch-nemesis. They play chess together and have been friends for a long time, but they completely disagree about the relationship that mutants should have with humans, so they are always fighting.
by David Aaron Smith May 20, 2007
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A gym nemesis is a person whose presence in the gym has a consistent adverse effect on one's own gym-going experience. The most common manifestation of such a person is someone who always seems to be on the equipment that you want to use but they could also just be an obnoxious, disrespectful, or otherwise unpleasant fellow gym-goer.
Mike: "Damn Joe, that neanderthal over there has been hogging the bench press for like an hour. And that's the third time this week! I think this guy might be single-handedly responsible for my under-developed pecs!"

Joe: "You know what you've got yourself there, don't you?"

Mike: "No. What?"

Joe: "You've got yourself a gym nemesis my friend."

Mike: "Fuck my life."
by wxflurry December 4, 2013
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Two or more people who just recently got out of a homosexual relationships who wish to slit each other's throat instated of anal penetration.
A: How are Drew and Andrew? Are they still going out?
B: No, they are butt nemesis now, they wouldn't even be in the same room, not even with other people.
A: Ouch.
by Ticki October 2, 2011
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Arch nemesis are friends from a long time ago that have more or less equivalent powers, but also have opposing ideologies. They are therefore always fighting with each other.
The FLASH and The ZOOM are arch-nemesis in the FLASH T.V. series.
by Ramky March 23, 2016
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A killer in Dead By Daylight who runs at you like Officer Earl whenever he sees an unhook notification.
Person A: “HOLY SHIT IT’S OFFICER EARL
Person B: “No, that’s just a nemesis main
by YuiMain#286 October 23, 2023
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A rollercoaster at alton towers that copyied the almighty nemesis inferno at alton towers
Nemesis is poo and i hate it
by David Jayne willaims January 23, 2005
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