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hell on wheels

Tough, aggressive, wild, or mean, as in Watch out for the boss—he's hell on wheels this week. This expression originated with the building of the Union Pacific Railroad in the 1860s, when it denoted the last town on the line, which was carried on freight cars as the track was extended. The town consisted mainly of tents occupied by construction gangs, liquor dealers, gamblers, and other camp followers known for their rough and often vicious ways.

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Question 1 of 9
You may have read the word "simmer" in a recipe or two, but what does it really mean?
To cook in water that begins cold and then reaches a boil.
To stew in a sauce for a long time.
To cook in water, just below boiling temperature.
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Words nearby hell on wheels

Hellman, Hellman, Lillian, hello, hell of a, hello money, hell on wheels, hell or high water, come, hell-raiser, Hell's Angel, hell's bells, Hells Canyon
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.