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A bordism is an equivalence relalation between maninfolds. Two n dimensional manifolds are bordant if their is an n+1 dimensional manifold whose boundary is the disjoint union of the two n dimensional manifolds
A pair of pants is a bordism between the circle and the disjoint union of two circles.
bordism by KoisterKloitch June 21, 2012
Related Words
1. An act that is absolutely and unforgivably embarrassing.

2. Can also describe an individual who is a low-life and lame.

Origins: Comes from the origins of peasant, which inevitably over time became pheasant. Only natural that it become birdish.
John: (makes an incredibly bad golf shot)

Earl: That was downright birdish!

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Susie: What is a Dutch Master?

Kelly: Silly girl, it's only America's premier smoking apparatus don't be birdish.
birdish by Pipeline Layer August 17, 2010

The Byrds 

One of the best bands from the '60s, influenced by The Searchers.
You know what? The Byrds were friggen awesome.
The Byrds by n.ns.iy.fma April 23, 2008

Bordision 

Decisions you make when you are bored
Like bro I just had the craziest Bordision
Bordision by Greg smaiser December 13, 2022
When you get drunk, then eat White Castle, and shit in random areas.
Dude we were so wasted last night. Me and Ron went byrding on my neighbors car.
Byrding by Tre H January 3, 2009
Someone who CLEARLY, only likes ducks and penguins.
Person 1: "Look at that lovely peacock"
Person 2: "I hate peacocks" <-- this person is obviously 'birdist'.
birdist by stellah54 September 17, 2013