like mushrooms

like mushrooms

Very quickly and in great quantities. Used in reference to things or people appearing or multiplying. As the economy recovered and jobs became more plentiful, high-rise apartments started popping up like mushrooms to accommodate the huge influx of worker pouring into the city. Self-professed writers started appearing like mushrooms with the advent of the blog.
See also: like, mushroom
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

like mushrooms

suddenly and in great numbers.
See also: like, mushroom
Farlex Partner Idioms Dictionary © Farlex 2017
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References in classic literature ?
An anchor of yesterday (because nowadays there are contrivances like mushrooms and things like claws, of no particular expression or shape - just hooks) - an anchor of yesterday is in its way a most efficient instrument.
Both dishes could do with more vegetables like mushrooms or carrots, but otherwise they were excellent.
And like mushrooms, they're also highly dependent on the right weather cycle.
But for long-term attention it is best to turn to film festivals devoted entirely to dance, which are sprouting like mushrooms after the rain.
"If you are having one, we'd say sneak in a few vegetables like mushrooms or tomatoes, have a poached rather than fried egg and use olive oil not fat to cook in.
Immigrant-baiting is now standard political fare, Maastricht a dubious dream, and red-brown hybrids are popping up all over the place like mushrooms after rain.