This document lists and defines 10 common English idioms: cash cow, cat nap, dark horse, holy cow, in the doghouse, rat out on, road hog, turn tail, wildcat strike, and wolf in sheep's clothing. The idioms describe ways to make money, short naps, unknown candidates, expressions of emotion, being in trouble, betrayal, aggressive driving, fleeing danger, spontaneous strikes, and pretending to be good while actually being bad.

1. IDIOMS
1. Cash cow
A good way to make money
2. Cat nap
A short sleep taken during the
day

2. 3. Dark horse
A candidate little known to the
general public
4. Holy cow
Used to express strong feelings
like astonishment, pleasure or
anger

3. 5. In the doghouse
In disgrace or disfavor
6. Rat out on
Desert or betray someone

4. 7. Road hog
Car driver who takes more than
his share of the road
8. Turn tail
Run away from trouble or
danger

5. 9. Wildcat strike
A strike spontaneously arranged
by a group of workers
10. Wolf in sheep’s clothing
A person who pretends to be
good but really is bad