mental weakness; fragile heart
Slang expression likening a person's mental resilience to soft tofu; used for someone who is easily hurt, discouraged, or emotionally fragile. Often used self-deprecatingly or in casual teasing.
See also: 豆腐メンタル
Getting down just from being scolded a little—you're way too mentally fragile.
私はメンタル豆腐だから、厳しい言葉はやめてほしい。
I'm mentally fragile, so please don't use harsh words.
Compound of メンタル (mental) and 豆腐 (tofu), literally 'mental tofu'. The metaphor compares a fragile mental state to the soft, easily broken texture of tofu. The exact origin is uncertain, but it is a modern slang coinage.