off balance - unaware. off guard
on the go - working or doing something all the time
on pins and needles - nervous. anxious. full of anticipation
on purpose - deliberately. intentionally
on the blink - not working properly.broken
pick up the tab - pay the bill or the cost of something
piece of cake - easy
play by ear - act spontaneously. without planning
pill it off - accomplish
pull one’s leg - make fun of somenoe in a playgul way. make somenoe believe something that is not ture
quite a few - many
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