Definition of 豆腐に鎹 (とうふにかすがい)

とうすが

豆腐に鎹

とうふにかすがい

toufunikasugai

expression, noun
having no effect, waste of effort(idiom )
Other readings:
豆腐にかすがい【とうふにかすがい】
Related Kanji
beans, pea, midget
rot, decay, sour
clamp, (kokuji)