From The Collaborative International Dictionary of English v.0.48 [gcide]:
Noggin \Nog"gin\, n. [Ir. noigin, or Gael. noigean. Cf. 1st
Nog.]
1. A small mug or cup.
[1913 Webster]
2. A measure equivalent to a gill. Hence: a small quantity of
a beverage. [Prov. Eng.]
[1913 Webster]
3. The head (of a person). [slang]
Syn: noodle, noddle.
[PJC]
From WordNet (r) 3.0 (2006) [wn]:
noggin
n 1: informal terms for a human head [syn: attic, bean,
bonce, noodle, noggin, dome]