Is there a nice way to describe a situation when one acts aggressively even fiercely and fearlessly and has "whatever it takes" mindset to achieve a certain goal as in English we say "to have a knife between the teeth".
There is remis velisque which is a possible option but I feel it is somewhat different as it seems to denote "with all one's might", while I want to put the emphasizes on the aggressiveness: the mental state - the attitude of that person.