A trap intended to catch a mouse, rat, or other unwanted rodent. Metaphorically used in emoji form to suggest any kind of trap or entrapment.
The style of trap shown on major platforms has a box held high with a single stick. A wedge of cheese is used to lure a mouse into the box, knocking the stick away and trapping - but not killing - the mouse.
This is distinct from other forms of trap which kill or injure upon capture.