1. [late 17C–19C] a hat [? nab n.1 (3)].
2. [early 18C+] (also knapper, napper box, napper tandy, nopper) the head.
3. [early 19C] a nose.
4. [late 19C–1920s] a face.
5. [late 19C–1920s] the mouth.
1. a wig.
2. the head.
[late 19C] to achieve something easily.
[late 19C] to go mad.
to be intelligent, to ‘have a head on one’s shoulders’.