weeder

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weeder

An especially difficult introductory college class that aims to eliminate less intelligent, less capable, or less dedicated students (i.e., "weed them out") from a program. Often used as a modifier before other nouns. I heard that computer-programming course is a real weeder. My brother failed it two years ago—along with most of the other students in the class. I don't know why these professors are so hell-bent on destroying students' morale with these weeder classes.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

weeder

n. a difficult introductory college course designed to get rid of the weaker students; a course meant to weed out the weaker students. Don’t get into the morning section of the course. The prof is tough and thinks it’s supposed to be a weeder.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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References in periodicals archive ?
While John Deere isn’t building automated weeders for vegetable crops, it is interested in the technology involved.
Two small horticulture units in south east Wales are to trial vision-guided, interrow weeders to determine the labour and time savings.
Two small horticulture units in south-east Wales are to trial the vision guided, inter-row weeders to determine the labour cost and time savings.
I find these weeders very helpful around soaker hose that we use a lot of here in California.
Organic crop interests sought and were granted the exemption from the ban on hand weeding, claiming that they would incur "tremendous" economic losses if they were required to use laborers with long handled hoes rather than hand weeders. An analysis prepared by the CropLife Foundation appears to confirm that assertion.
Mechanical weeders can do the job, but only if they are equipped with expensive proximity sensors to keep them from damaging delicate vines.
For a range of beautifully produced, traditional garden tools, check out Burgon and Ball, whose catalogue includes everything from trimming shears and pocket knives to topiary frames, watering cans, secateurs and, of course, trowels, hand forks and weeders.
The weeders successfully eradicated Trichoderma from most colonies.
Cultivators and weeders. Single-tined cultivators are at their best slipping through the spaces in closely planted bulb and flower beds.
The range has been extended to include beautiful hand weeders as well as larger tools and apart from discouraging slugs, they are fabulous to use and even nice to look at!
Troll through Web sites such as Lee Valley Tools and scan the aisles of retailers such as Down to Earth and Jerry's, and you'll find dozens of long-handled diggers, short-handled grubbers and propane-powered "flame weeders" that reduce chickweeds to piles of wilted leaves before you can say, "Spring's here."