Not temperate or moderate; excessive, especially in the use of alcoholic beverages.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "intemperate" in a sentence
"As such it takes us back to the days when Cameron was denouncing anyone who backed Grammar Schools in intemperate terms or rejecting any contrary position as ‘pointless’ or deluded or whatever."
"People called him on it (some perhaps in intemperate ways, others not, but they were right and he was mistaken)."
"Unfortunately, Hailey himself ended up engaging in intemperate attacks on Wizbang’s site."