drag (one’s) feet:
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- to be moving slowly and reluctantly because one does not want to do something
- act or work with intentional slowness, deliberately hold back or delay

"I get the feeling she's dragging her feet because she's scared to go to the dentist."
"He knows he should see a doctor, but he's dragging his feet."



put (one’s) foot down:
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- to use your authority to stop something from happening
- deal with someone in a strict way

"When she started borrowing my clothes without asking, I had to put my foot down."
"He had planned to go skiing in March but his wife had decided to put her foot down."



put (one's) feet up:
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- to relax (as by lounging with one's feet elevated)

"After a long day at work, I love to come home, put my feet up, and watch some TV."



get cold feet:
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- have a feeling of worry or doubt that is strong enough to stop you from doing something that you planned to do

"He was going to ask her to marry him, but he got cold feet and couldn't do it."



put (one's) foot in (one's) mouth:
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- Say something foolish, embarrassing, or tactless.
- say something that causes someone to be embarrassed, upset, or hurt especially when you did not expect that reaction

"I really put my foot in it when I asked her about her job. I didn't know she'd just been fired."
"Jane put her foot in her mouth when she called him by her first husband's name."