They have spent an 'unholy' amount of money on the project.
an 'unholy alliance' between politicians and lobbyists
Our finances were an 'unholy' mess.
(..) Good. What's in the bottle? Holy water. Presence of religious icons... ...will get a reaction from anything unholy. Sort of pisses them off. So I set these throughout the house, see if I can stir things up a bit. - Like holding a cross to a vampire? - Yeah. Exactly. (..)2013 The Conjuring