庇ひさしを貸かして母屋おもやを取とられる

expression, ichidan verb

give an inch and they take a mile; kindness repaid with ingratitude

Proverbial expression: lending a small favor (the eaves) only to have one's entire house taken. Used when a small kindness is exploited or returned with harm. Sense 2 (favor returned with spite) is a natural extension of the same core idea.

• 彼かれに少すこしだけ手伝てつだってあげたら、庇ひさしを貸かして母屋おもやを取とられるように、全ぜん部ぶ押おし付つけられた。

  I helped him just a little, and like 'lending the eaves and having the whole house taken,' he ended up pushing everything onto me.

• 善ぜん意いで注ちゅう意いしたのに、逆ぎゃくに怒ど鳴なられるなんて、まさに庇ひさしを貸かして母屋おもやを取とられるだ。

  I gave him a friendly warning, but he yelled at me in return—truly a case of 'give an inch and they take a mile.'