Is there a shortcut to toggle Mesh outline?

When a mesh/game object is selected in the scene view, it shows blue outline/wireframes.

While it’s useful in some cases, sometimes I just want to focus on the mesh object without seeing the blue wireframe.

Is there a way to do that? Like holding a shortcut to temporally hide it? I find myself having to select another object every time, which isn’t as convenient.

Not out of the box. But you can with this editor extension:

In the latest 5.5.0 beta the wireframe was replaced by an outline display (switchable if you prefer the old selection)