From Longman Dictionary of Contemporary Englishlike weedslike weedsin large numbers Cars clogged the roads like weeds. → weed
Examples from the Corpus
like weeds• Still, development had sprung up around the edges, like weeds encroaching on a garden.• The eggplants flourished, and the next spring more of them popped up all over the garden like weeds.• Cars were suffocating the roads like weeds.• Flavor-of-the-month or program-du-jour comments crop up like weeds.• Aerials sprout up like weeds on the roof. 