Green’s Dictionary of Slang

noddle n.

[15C SE noddle, the back of the head]

1. [16C+] (also nod, noll) the head.

2. [late 16C+] used fig. to denote the head as a seat (or not) of intelligence.

3. [late 18C–mid-19C] an empty, foolish head; thus a fool.

In derivatives

noddleheaded (adj.)

[late 19C+] confused, forgetful.

In compounds

noddle-case (n.)

[18C] a wig.

noddlehead (n.)

[1900s] (US) a fool.

noddle-rubber (n.)

[late 17C] a club.

noddle-thatcher (n.)

[18C] a wig-maker.

In phrases