A base established on a moon. In particular, the two bases established by the Autobots on the two moons of Cybertron prior to Transformers: The Movie. Given the highly original names "Moonbase One" and "Moonbase Two" (!!), these were to be the base of operations for recapturing Cybertron from the Decepticons. They were meant to be secret, but the Decepticon Laserbeak was able to infiltrate them. Before any attack could be launched, the moons were devoured by Unicron.

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originaly a small alcove under stairs in bournmouth university, it is now used as a tearm for attractive men.

A vagina that is so barren it cannot support any life due to the constant assault by penile beings.

you see someone 'visually pleasing' walking down the road-and if youre feeling bold you can either shout 'moonbase' in their direction or say to someone 'oh! i was walking down the road and i saw a proper moonbase' provided they know what it means.
the phrase originated on the south coast of england.

A Rather Fetching Ethnic Male Of The Human Species