Hi guys 👋,
Could you please help tell me the meaning of these phrases:
1. Go over the hill
2. I saw red
They are from this sentence:
"I knew it would be difficult to rent the apartment again before fall. I could see that rent income going over the hill and believe me, I saw red."

Thank you 😊

Question

Hi guys 👋,
Could you please help tell me the meaning of these phrases:
1. Go over the hill
2. I saw red
They are from this sentence: 
"I knew it would be difficult to rent the apartment again before fall. I could see that rent income going over the hill and believe me, I saw red."

Thank you 😊

Answer

To "see red" is to get really angry. The speaker seems to be saying that he got angry because he is going to lose some rental income.

"Over the hill" is a common idiom, but not in that context. "Over the hill" normally means someone is old, washed-up, no longer in demand or doesn't have the skills or abilities he used to have.