Very long Moo

Mooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo - u

Cow
Moo
Animal
Agriculture
Farm
Livestock

Explanation

Explain Bear

Listen up, buttercup. This joke is so bad it's good... or just bad. It's just a cow saying "moo" a whole bunch of times, followed by a "- u". It's peak comedy for people who get their humor from staring at walls. By the way, you drool when you sleep.