Express indifference or disregard; 'without hesitating', 'without worrying about'.
Long explanation:
The ~もかまわず grammar point is used to express indifference or disregard, showing that someone does something without worrying or thinking about the consequences. It can be translated as 'without hesitating' or 'without worrying about' in English. It is attached to either nouns or verbs in their dictionary form.