Spoiler Alert:
At the end of the Avenger's: Infinity War movie, Thanos disintegrates half of the population in the universe, including Spider-Man, who says "I don't feel so good" before disintegrating.

when you're hungover as shit after a spending a night drunk as a skunk

A sentence said by Peter Parker (Spider-man) before turning to dust and dying. If saying this in front of a marvel stan or tom holland stan, it could cost a punch, slap etc.

The words in which Peter Parker (Spider-Man), said before he turned into ash in the movie "Avengers, Infinity War." These simple 5 words are now many marvel fans trigger words. If you have a friend who likes Marvel, do not... I repeat DO NOT, say "I don't feel so good." Replace it with "I don't feel that well," or "I'm not feeling very good."

What Spider Man is, and will always be.

Thanos: Snap
You: I dont feel so good

What Spiderman said to Mr. stark in Infinity War