2. hormonal woman
3. beached whale
He has been spotted in various parts of the world and is reportedly related to bigfoot, la chupicabra and various spineless fish. The existance of "Metty" is inevitably unknown for anyone who comes into contact with this creature has his pants exploded.
Chav/yob slang (with geodie dialect) for:
"I am going on the Metro"
The word mission is added purely out of chav stupidity.
<Corran> No Metty, You're gay
<Metty> be back in 10 mins
<Metty> gonna go jack off over my iron maiden poster
<Metty> come to me steve harris!