A Chog is when the physical state of a woman's pussy, or front bum (amoung other glorious names for the anatomy) is very prickly to touch. The once shaven pubic hairs have regrown in such a manner that they best resemble a cactus, a thorn bush or the prickles of a hedgehog. The word itself is derrived from the word hedgehog (hense chog) and is a great slang word to use amoung friends.
A girl in my school has a chog! My best friend Jo sims told me this and showed me where her prickles got him! So from that moment onward the female in question was known as The Chog!