Idiom Magic﹕堅決要做到 Out for blood

【明報專訊】Ma and Pa Mosquito and all their little ones are preparing to go out for dinner. "We didn't catch anyone last night so we are really out for blood tonight," Pa Mosquito warned. That should send a hint of fear into us for to be out for blood is to be filled with determination (決心) to do something, especially after having failed in a previous attempt.