Unable to take any action. Especially when referring to something that's usually powerful.
"So Initech won't be able to deal with this new virus?"
"Nope. They'll have their thumbs up their asses."
by 13431231232342345234 December 4, 2006
(adj.) Not doing what you should be doing, be it at work or in free time. Pls note it can be 'thumb up my/your/his/hers/possessive pronoun's ass" as needed. I just put "your" in the entry title because it's the most common.
Manager bitching at employee at anywhere Wal Mart USA: Yo! Cletus! Stop sitting around with your thumb up your ass and get unpacking those crates.
by Zamboni_fahrer August 5, 2010