weeder

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.

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
See also:
  • even/much/still less
  • much less
  • the path less traveled
  • the path less chosen
  • under (someone's or something's) shadow
  • take the path less chosen
  • under the shadow of (someone or something)
  • in the shadow of (someone or something)
  • in/under the shadow of
  • a little frog in a big pond
References in periodicals archive
Wearing Bionic Gloves and carrying a Cobrahead weeder is the perfect way to combine my favorite gifts.
It's in hand
The Uproot Weeder could also be called the Upright Weeder, since there's no bending or stooping involved.
Find your roots (and yank them out)
Mechanical weeders can do the job, but only if they are equipped with expensive proximity sensors to keep them from damaging delicate vines.
Weeding without sensorship: This cutter is taking some of the labor out of caring for delicate grape vines
The purpose of NEWS WEEDER is to learn to filter the flood of online news articles on behalf of its user.
Does machine learning really work?
Men's gardening gloves, PS4, aluminium soft grip scoop, PS4, enamel compost bin, PS14, hand trowel, PS4, cast iron twine stand, PS5, wire basket fruit carrier, PS5, digging fork, PS20, digging spade, PS20, bow rake, PS17, cultivator, PS15, weeding fork, PS10, weeder, PS15, seed tray green 24 insert 3pk, PS1.50.
of the best... garden art of the best... garden art
* Remove isolated weeds in paths, drives and patios with an old knife or by spraying with a spot weeder.
What to do this week
With that in mind I had considerable admiration for the inventor of the cable weeder Jim Lacey writes about in this issue of Farm Collector.
From the smallest sprout
WEEDER Blowtorch like one used; BLACKENED Dr Gailey's weed kill 'improvement'; EMBARRASSED Dr Gailey
Percy flamethrower; BLOWTORCH BLUNDER OAP BURNS GARDEN
We sell some of our goats to people who want to clean up their woods (remember we have "weeder" goats), which works out' pretty well.
Renting out your quadriped weed wackers
One of the highlights of HTF[R] was a retail panel featuring Larry Pensinger, Do it Best Corp.; Jim Vincent, The Home Depot; Victor Salandanan, Lowe's; Ken Walls, Wal-Mart Stores; Mike Weeder, True Value Co.; and Andrew Ryan-Kidd, Independent Timber Merchants.
AHMA's Hardlines Technology Forum focuses on supply chain efficiency
"Another similar one made by Yard Butler is the Rocket Weeder and the Fiskars' product is the UpRoot."
WEAPONS of the WEED WAR
* "Got to try this." Here I've reminded myself to experiment with 'Spanish Roja' garlic, 'Yellowstone' landscape rose, and a new kind of weeder. When I clip an article, I slip it into a vinyl pocket.
Grow a garden journal: it keeps track of plant labels, seed packets, and more. (Garden: Project)
You can use a spot weeder to deal with any weeds which appear during the summer.
Gardening: Gardening chores
In this one, accompanied by squad members Steve Hamilton, Paul Jones and Chris Weeder, Tony took the day's individual honours for a creditable final match win with a 63lb catch off Spey.
Angling