It's a meme.

Meaning

It's a humorous image or video that spreads online.

Examples

• John: Did you see that funny video on TikTok?
• Alice: Yes! <b>It's a meme</b>. It's hilarious!
• John: I saw it too. It's already got millions of views.
• Alice: Yeah, that's why <b>it's a meme</b> – it's going viral!