They called it a comet, 'for lack of' a better term/word. [=because they could not think of a better term/word for it]
His honesty, or 'lack thereof', is the real problem. [=the real problem is his lack of honesty]
There was 'no lack of' interest in the proposal. [=there was much interest in the proposal]
(..) in front of your child, okay? That's being more rational than Bill led me to believe you were capable of. It's mercy, compassion, and forgiveness I lack. Not rationality. Look. I know I fucked you over. I fucked you over bad. I wish to God I hadn't, (..)2003 Kill Bill: Vol. 1