The term "am on back of" suggests being in a position of control or influence over a situation or individual. Antonyms for this phrase might include "below," "under," or "inferior". These opposing terms indicate a subordinate or subservient role, rather than a position of power or authority. Another antonym could be "uninvolved," implying that one has no stake in the matter at hand. Additionally, "distant" or "removed" can express a sense of detachment or disconnection from the situation. Antonyms for "am on back of" are useful in expanding one's vocabulary and understanding of various power dynamics.