The term "generalized abstract nonsense" is usually jokingly (and endearingly) applied to topics in mathematics of very high abstraction level, mostly category theory. It probably refers to the fact that some concepts in category theory can abstract away so far from the actual mathematical structures that are described as to lose all connection to the actual meat of the matter.

Yoneda's lemma is just generalized abstract nonsense.

generalized abstract nonsense by Dominique U March 10, 2018

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Oriental Nonsense

When you go to get your nails done, these are the nonsense sounds you hear the orientals yelling at each other.

Paige Marie: Hello
Oriental (loudly): Harrow!
----20 minutes later---
Oriental 1: In ching song chu yang tuvye.
Oriental 2 (even louder): Ching wan buyg sa!
----Those noises are oriental nonsense.-----
++++And it continues for the remainder of the time you are there just trying to get your nails done.

Oriental Nonsense by PaigeMarie&MitchellRobert November 9, 2010

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woke nonsense

A word made up by crybaby consies to justify them bashing non-white, disabled, gay, and trans people simply for existing. Joke’s on them though because we reclaimed that phrase already lol.

Person A: Look at this woke nonsense on a kid’s show!
Person B: This show has an autistic black girl as the protagonist though, what’s the problem?
Person A: *clutching their AK-47 in fear* Kids don’t need to be learning about this stuff!

Person B: *on the phone* Yes police, I think I’m being held hostage by an insane person-

woke nonsense by Yeplol August 30, 2023

nigga nonsense

when something is so ridiculous that it requires the word nigga in it.

Dan: Dude, i fucked 5 bitches yesterday.
Chad: Dude, that's some nigga nonsense.

nigga nonsense by chazzledazzle February 25, 2010