English rendering Devise petty tricks Literal translation: “Roll one's little brain”
Use one's mind to come up with shallow tricks.
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Writing text잔머리 굴리다
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3 meanings Shared · 2 Take aim; assess; check a scale Aim at a target. 
3 meanings Shared · 2 take aim or assess To aim at a target. 
Be able to gauge Be able to make or arrive at a guess or assessment 
fade from memory For something once remembered to be forgotten. 
have a good memory for routes To remember routes well enough to find a place after only one or two visits. 
Have a poor sense of direction Remember routes so poorly that one cannot readily retrace a road already traveled 
act strangely For one’s attitude or behavior to be odd. 
Feel conscious of others’ reactions Come to watch another’s feelings and attitude 
Be quick to read others Recognize others' feelings unusually quickly. 
watch someone’s reactions To examine another person’s feelings and attitude. Browse in Hangul order.
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