Here is a cursory collection of horse and cattle terms used in common English. It compliments the list of Bird and Dog English posted much earlier. As a teacher you/one can use these terms in a lesson of your own creation.

Horses

Stop horsing around.(Rough play.)
I had a nightmare. (Dreaming of horses was considered a bad thing in the past.)
Check out that young filly! (young girl/woman)
He's just a colt.(young guy/boy)
What a stallion of a man he is.(powerful or sexy)
He's been long in the saddle. (Can mean tired or very experienced.)
Let's hoof it! (Meaning: Let's walk.)
Hoof it! (Get going.)
Saddle up. (Means: Let's get going.)
He's not broken or broken in. (Means not saddle-broken like a new horse, not tamed or trained.)
We'll just have to take the bit.(Means take the work or hardship assigned and deal with it. Most horses have a metal bit in the mouth, part of the bridle control apparatus).
My car has stalled. (This may have been transfered from the horses in the barn stalled, or in its stall and not going anywhere.)
I'll have you horsewhipped.(Whipped like a horse.)
This is a hackneyed business.(A Hackney Pony walks with a special gait with knees brought up high. It is elegant but very artificial and has to be trained. Today it has negative meanings and means not very good or poor quality.)
You old nag! (Meant an old mare, but has been transfered to any nagging person.)

Cattle

You are all nothing but cattle! (Means easily led, not thinking independently.)
You cow! (Insult directed at women but sometimes men. Can mean slutty or big and clumsy.)
Bullshit. (A term meaning a lie or untrue.)
He is a bull. (Vigorous or powerful like a stallion.
He's a bully. (A thug. One who uses force on others.)
What a calf. Or: Such calf-eyes. (Sweet-faced like a calf.)
Check out that young heffer. (Means a young woman.)
What an ox! (Means a clumsy guy or one who is very powerful.)
A bull in a china shop. (A person who wrecks or would wreck beautiful delicate things like china ceramics.)
Horny. (Means feeling sexual.)

Copyright Robin Day 2006