Excessively boring, tedious, or dull; repetitive; of an activity, etc., lacking any interest or variety that might serve as intellectual stimulation.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "mind-numbing" in a sentence
"Colton Harris-Moore, now 20, showed no reaction as the sentence was delivered by a judge who took pity on his bleak upbringing at the hands of an alcoholic mother and a series of her convict boyfriends - a situation she described as a "mind-numbing absence of hope.""
"And whether these drinks generally deserve as much celebration as the mind-numbing array of lively designations attached to them suggests is another matter."
"I was going to have to embrace the mind-numbing terror, the inner coward that I had become."