Essential fixed phrases to know

腹に据えかねる

[hara ni suekaneru]

can't stand it anymore

口を滑らす

[kuchi o suberasu]

slip of the tongue

口を閉ざす

[kuchi o tozasu]

keep silent

手を抜く

[te o nuku]

do something carelessly, superficially

手を尽くす

[te o tsukusu]

give one's all

手を加える

[te o kuwaeru]

intervention / modification

目を疑う

[me o utagau]

can't believe my eyes

目をつぶる

[me o tsuburu]

turn a blind eye (overlook, forgive)

耳を疑う

[mimi o utagau]

can't believe my ears

耳が早い

[mimi ga hayai]

sharp-eared, quick to catch news

肩を並べる

[kata o naraberu]

on equal footing, side by side

腕に覚えがある

[ude ni oboe ga aru]

confident in skills

腕が鳴る

[ude ga naru]

eager to demonstrate ability

足を引っ張る

[ashi o hipparu]

hinder, hold back

足元を見る

[ashimoto o miru]

take advantage of others' weaknesses

頭を抱える

[atama o kakaeru]

confused, troubled by the problem