at the lowest possible limit or level; extremely low:
rock-bottom prices.
Origin
1880-85
Examples from the web for rock bottom
To them it smelled of government regulation, limited yields, and higher taxes at a time when wine prices were at rock bottom.
But prices are rock bottom for these portions and true gluttons wouldn't eat anywhere else.
Property tax bills go up, home prices remain at rock bottom.
Aquatic vegetation is uncommon, due to the gravel and rock bottom.
rock bottom is found in the fastest water because all smaller materials are swept downstream.
Projects with culverts which have a rock bottom or underground utilities will be exempt from the bottomless requirement.
Bottom trawls, dredges, and coring devices are used to collect animals that live in or on the sediments and rock bottom.
British Dictionary definitions for rock bottom
rock bottom
noun
1.
the lowest possible level
(as modifier): rock-bottom prices
Word Origin and History for rock bottom
rock-bottom
adj.
"lowest possible," 1884, from noun (1815), from rock (n.1) + bottom (n.).
Slang definitions & phrases for rock bottom
rock bottom
modifier
At the lowest level or part, esp in price: rock-bottom prices on Easter stuff
noun
The lowest level or part: hit rock bottom last week
Idioms and Phrases with rock bottom
rock bottom
The lowest possible level, absolute bottom, as in Wheat prices have reached rock bottom. This idiom alludes to the presence of bedrock that prevents digging farther down. [ Late 1800s ]