What the cow says

a sound cows make when they see a car.

A rather more polite way of calling an unpleasant, disagreeable female a cow

A rare and expensive drug found in Cambridge, Massachusetts, distributed by the being known only as Dr. PrepStone aka the Pterodactyl. It is basically ground up cow utter which, when smoked, releases all of the cow's hormones in addition to its remaining milk. It can cause anything from hallucination to seizures.
It was originally discovered by British Prime Minister Winston Churchill, who created it in an experiment alongside Bono's grandfather, Bono. Its full potential was not known until along came a Vietnamese doctor named Timbuk the Second, commonly written as Timbuk II. Warning: can cause induced menstrual cycle in male users.

A legendary creature that goes rawr in the night.

Moo /mu/ vi. (Cowian) infinitive form of the verb “to moo”.

Note on pronunciation: Cowian is a tonal language containing over 35,000 known words, the vast majority of which are pronounced (approximately) “moo” mu.

"Moo" means "I love you" in cow-speak.