It's an outline of a persons face with a very large nose, that is poking through a crack in a door. The person is in the middle of walking in on someone.
This Butting In icon is made in flat color style
. This format was developed by Icons8 designer team and became immensely popular for use in web and mobile applications. Feel free to download this icon in PNG format for free, or unlock other formats for $5. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 5,900 icons, all in the same style and quality.