door hanger
door hanger · door hangers
A sign or advertisement that is cut so that it can be hung from the handle or knob of…A sign or advertisement that is cut so that it can be hung from the handle or knob of a door.
Meaning
2 sensesA sign or advertisement that is cut so that it can be hung from the handle or knob of a door.
A visual notification that drops down from another element such as a toolbar icon.
Origin
From door + hanger.From door + hanger.
Wiktionary, CC BY-SA 4.0 · source