What does the idiom 'go/stop cold turkey' mean?

To go buy cold turkey from the supermarket

To wear something that will keep you warm 

What does the idiom 'spice things up' mean?

What does the idiom 'a piece of cake' mean?

What does the idiom 'make ends meet' mean?

To be able to make money to cover basic expenses

What does the idiom 'not my cup of tea' mean?

It's not something I'm not interested in or do not enjoy

When I meet someone who's not warm like tea

What does the idiom 'go with the flow' mean?

To relax and go along with whatever happens in your life

What does the idiom 'bury your head in the sand' mean?

To avoid a situation and pretend it doesn't exist

What does the idiom 'sit tight' mean?