Glitching - What doe it mean when a game is glitching?

Glitching has 2 meanings. The most common is "Malfunctioning video game." See examples of how people use the terms.
Glitching is when a video game malfunctions. It commonly pertains to graphics, gameplay, audio, and other aspects of the game.

10 Best Games That Use Glitches As Part Of The Experience

Why is my Stream Lagging and How to Fix it? - Kiloview

How to Fix the Screen Glitch Effect in Cyberpunk 2077

What happens when the Glitch power-up is applied in a game? – Help

Glitch Art 101: Mostly Everything You Need to Know About Glitch

THE PINK SCREEN OF DEATH GLITCH IS BACK!? (ROBLOX)

What are Glitches? All you need to know about these amusing

How to fix iPhone X screen glitch

PS5 Lagging with Good Connection? [Reasons and Solutions

Meaning of GLITCH Words For Gamers [REFG]

How to Fix a Flickering Phone Screen