Idioms:in hot water

In hot water

in trouble,stuck in reverse;have a big trouble;

For instance,

----He is in hot water these days,as her girlfriend found out he is seeing another woman.

----The movie actor tried to cheat on his income tax,but he got caught and he is in hot water with government now.

To throw cold water on sth.

beat sb's plan,or tell something bad on one's dream ,meant to cool one's desire on sth.,make someone cold

---everybody else in the office thought my idea was great,but my boss threw cold water on it.

----i had planed on going to medical school and my dad threw cold water on the idea the other day when he told me he wasn't sure he had the money to pay my tuition for so long