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]
(..) And that includes Halle Berry's. She's not Catwoman. She's just a generic cat. And that's the kind of sloppy costuming which results from a lack of rules and competion. Hey, guys, check out the sexy nurse. I believe it's time for me to turn my head and cough. What is your move? (..)2007 TvShow: The Big Bang Theory Title: The Middle Earth Paradigm Season: 1 Episode 6