Use when someone enters a room or conversation quickly and without consideration, often interrupting others.

Abrupt Entrance

It implies a person is being rude or inconsiderate by not following social etiquette.

Lack of Manners

Suggests that the action of entering was done on impulse, without thought or permission.

Used when someone cuts into a conversation without waiting for an opening or pause.

The act can evoke annoyance or surprise among those who are interrupted by the sudden input.

It's usually used in casual settings; less common in formal or written language.