pre-noun adjectival
detestable; despicable; abhorrent
Strongly negative pre-noun adjectival; used to describe something or someone that deserves contempt or disgust. Relatively formal and emphatic.
His actions are detestable.
Despicable crimes are on the rise.
From 唾棄 (daki, 'spitting out in contempt') + すべき (subeki, 'should do'), literally 'should be spat out'. The exact historical derivation is uncertain, but the expression is a fixed literary compound.