English rendering Outdo grown-ups in shrewdness Literal translation: “Slap an adult's cheek”
Of a child, be so shrewd that even adults cannot match them.
Dictionary example 1
그놈 참 어른 뺨치게 장사 한번 잘하는데.
Read the meanings, trace, then cover above the masking line and write. Uncover, choose a meaning, and make your own sentence.
Writing text어른 뺨치다
Explore the body parts or scenes linked to this idiom.
A silent film that writes the headword and its meaning.
Be ludicrously childish Be laughable like children’s mischief 
As one pleases Figuratively, arbitrarily change a matter as one likes, just as a candy seller stretches candy freely. 
2 meanings Lead or dominate Become the leader or an officer of a group or alliance 
Have a large family network Have many family members or relatives 
Shared · 2 Be devoid of human decency Lack the conduct or virtue a person should possess 
Shared · 2 win favor To gain favorable opinions from others. 
Be overly generous Treat others more generously than necessary 
Shared · 2 Win goodwill Receive favorable regard from others. 
lose goodwill To fail to gain favorable opinions from others. 
Be overwhelmed by a crowd Be mentally overwhelmed and confused by the collective energy of many people. Browse in Hangul order.
WORDROW Korean Idioms