get the advantage of
Also, get or have the advantage over. Be in a superior position to, as in He had the advantage over me, since I couldn't even remember his name, let alone his position. [Mid-1500s] Also see get the better of; get the drop on.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.