Definition of moon-shaped:
(n) :
(informal, by extension of Moon) Any natural satellite of a planet.
(n) :
A representation of the moon, usually as a crescent or as a circle with a face; a crescent-shaped shape, symbol, or object.
(n) :
(literary) A month, particularly a lunar month.
(n) :
The eighteenth trump/major arcana card of the tarot.
(n) :
(card games) In hearts, the action of taking all the point cards in one hand.
(v) :
(transitive, colloquial) To display one's buttocks to, typically as a jest, insult, or protest.