Definition of step off:
(v) :
(African-American Vernacular, inseparable) To avoid a conflict; to back down.
(v) :
(inseparable) Used other than figuratively or idiomatically: see step, off.
(v) :
(separable) To measure by steps or paces; hence, to divide (a space), or to form a series of marks, by successive measurements, as with dividers.