Wiktionary
draw off
vb. (context transitive idiomatic English) To remove by using a siphon.
WordNet
draw off
v. remove by drawing or pulling; "She placed the tray down and drew off the cloth"; "draw away the cloth that is covering the cheese" [syn: draw away, pull off]
remove (a commodity) from (a supply source); "She drew $2,000 from the account"; "The doctors drew medical supplies from the hospital's emergency bank" [syn: withdraw, draw, take out] [ant: deposit]
Usage examples of "draw off".
Our histories tell us that in ancient days an occasional lucky sprite managed to take the place of a man-larva at birth so that he might draw off the liquid fresh-made.