Wiktionary
leave off
vb. 1 (context transitive idiomatic English) To omit. 2 (context informal English) To desist; to cease. 3 (context intransitive English) To stop with a view to resuming at a later point.
WordNet
leave off
v. come to an end, stop or cease; "the road leaves off at the edge of the forest"; "leave off where you started"
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, omit, take out] [ant: include]
stop using; "leave off your jacket--no need to wear it here"