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]
(..) that I forgive you. This mutiny isn't your fault, it's mine. I haven't earned these bars. Although what I lack in leadership, apparently I more than make up for in sewing. Let it go, Sheldon. I'll get you a Jamba Juice (..)2011 TvShow: The Big Bang Theory Title: The Skank Reflex Analysis Season: 5 Episode 1