weed out

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weed out (third-person singular simple present weeds out, present participle weeding out, simple past and past participle weeded out)

1. (idiomatic) to remove unwanted elements from a group
   • 1557 February 13, Thomas Tusser, A Hundreth Good Pointes of Husbandrie., London: […] Richard Tottel, OCLC 1049068421; republished London: Reprinted for Robert Triphook, […], and William Sancho, […], 1810, OCLC 7109675:

     In May get a weed-hook, a crotch and a glove,
     And weed out such weeds, as the corn doth not love

   To weed out problem users, watch new people's behavior.

• outweed