Dear fellow users, do you know if there is a shortcut to temporarily disable snapping when rotating objects ?

When rotating by dragging rotation handles, shift key leads to rotate object around the opposing corner of bounding box.

All I can suggest is the Snapping On/Off shortcut [shift+5].

Thanks Paddy

I didn't find a possibility for a custom shortcut in preferences (but there are a lot of possibilities).

[shift+%] on PC, you mean