It means that somewhere there is a very sad weasel family :(
Weasel
Weasel.
Means that it is dead.
It can mean that you have a headache or something
its dead
Black-footed weasel.
Screeching Weasel
The life has left their bodies.
It can, but only as a scavenger. A weasel might have a nibble if it'd find an already dead deer, but it's way too small to be able to kill a deer itself. There is, however, a species of weasel that is capable of killing and eating a deer, and that is the wolverine.
In Japanese, the name Itachi means "weasel." It is a traditional name that is often associated with qualities such as agility, stealth, and intelligence—characteristics that are symbolically linked to the animal.
They are rabid if you see them in the daytime and they want you to pet them
See link below.