Meaning:
1.to be very happy (elated)
2.so pleased as to be amazed

Example Sentences:
1.I have been walking on air since I found out that I have been awarded a scholarship to study music.

2.She has been walking on air since getting engaged last week.
Source: theidioms.com

ラウンジ英会話では、役に立つ英語フレーズをたくさん身につける事が出来ますよ♫

Meaning:
This phrase refers to someone who becomes happy at hopes provided based on false facts.

Example Sentences:
1.The money was never going to be deposited by him. He kept promising her and let her stay in that fool’s paradise for way too long.

2.You must be in a fool’s paradise if you think that it will rain at the time of such hot summers.

ラウンジ英会話では、役に立つ英語フレーズをたくさん身につける事が出来ますよ♫

Meaning:
Fast food is also known as junk food; examples include pizza, burger, French fries, candies, fizzy drinks, etc.

Example Sentences:
1.Nina loves French fries and other fast food.

2.She is so addicted to such fast food that she now she completely avoids proper meals.

ラウンジ英会話では、役に立つ英語フレーズをたくさん身につける事が出来ますよ♫