I agree with keeping elbow_gloves.

Some unused/useless ones I've found:
happy_birthday - Useless
silver_hair - Alias to gray_hair
necktie - tie already exists

Too many more to list. Just looking at the tag list, there are a ton of tags that are barely used. As in most of them.

Cuda007 said:
General tag under 3 can be killed as well.
56 pages out of 71 in general tags o.o

But I do agree with that.