Also, add fuel to the flames. Worsen an already bad situation, as by increasing anger, hostility, or passion, as in Bill was upset, and your making fun of his mishap just added fuel to the fire. This metaphor dates from Roman times—Livy used it in his history of Rome—and it remains in common use. For similar metaphors, see add insult to injury; fan the flames.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.