He's 'deadly' [='dead'] serious about finding another job.
Officers are allowed to use 'deadly force' if necessary.
The two gang leaders are 'deadly' enemies.
(..) You're working for Miranda Priestly now. You must be in desperate need of hard liquor. Excuse us, girls. She'll have the punch. It's deadly. Have fun. - He's right, you know. - Hmm? The punch. I drank it at James' last party. I woke up in Hoboken wearing nothing (..)2006 The Devil Wears Prada