butt in
Intermediate (B1)informal
To push yourself into a conversation or situation when nobody asked for your opinion.
"My brother always butts in when I'm trying to talk on the phone — it's so annoying."
Hear it in context

Trying EVERY Fast Food Burger!
Jake Webber · 3:24
Poopy butt in German.

You're Using Tabs Wrong
WVFRM Podcast · 5:20
I'll butt in.

You're Using Tabs Wrong
WVFRM Podcast · 5:25
Don't butt in this.

Trying EVERY Fast Food Burger!
Jake Webber · 3:20
That's poopy butt in German.

Warframe | Prime Time 480: Devstream 195 Coming Soon!
PlayWarframe · 7:49
Don't say butt in chat.