cull out(redirected from culls out)
To separate and remove someone or something from a group. A noun or pronoun can be used between "cull" and "out." We were so determined to win the science bowl that we culled out everyone who seemed susceptible to stage fright. We culled the weakest members of the herd out so that only the strongest would reproduce.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.