From WordNet (r) 3.0 (2006) [wn]:
leave off
v 1: come to an end, stop or cease; "the road leaves off at the
edge of the forest"; "leave off where you started"
2: prevent from being included or considered or accepted; "The
bad results were excluded from the report"; "Leave off the
top piece" [syn: exclude, except, leave out, {leave
off}, omit, take out] [ant: include]
3: stop using; "leave off your jacket--no need to wear it here"