The antonyms of the phrase "being tail" would be "being head" or "being leader." When we talk about being tail, it means being at the back, following or trailing behind. Thus, its opposite would be being at the front, leading the way, or taking charge. Being tail implies a lack of authority, control, or influence, while being head signals the opposite - possessing power, expertise, and command. Being in the tail end of things may connote a feeling of being left behind or being insignificant, while standing at the head indicates importance or prominence. These antonyms show the contrast between being a follower or a leader, a subordinate or a superior, or a mere participant or an initiator.