1. be tied up（手がふさがっている、予定が詰まっている）
= I'm tied up right now, so can you call bak later?
2. hit the roof（かっとなる、頭にくる）
= She hit the roof when she found out the truth.
3. fend for oneself（自活する）
= She is old enough to fend for herself.
4. lay it on thick（大げさに言う）
= He laid it on thick about how disappointed he was.
5. sweat it out（どきどきして待つ）
= She sweated it out until the call came.
6. turn over a new leaf（心を入れ替える）
7. manifest oneself（現れる）
= Her musical ability manifested itself at the age of 3.
8. pull the plug on（～を打ち切る）
= The government pulled the plug on subsidies for solar panels for homes.