Apparently, according to here (http://cbsncis.wetpaint.com/page/Guess-tures), he simply signs what he's been saying that she can't hear. "Good Thinking". He used SEE (Signed Exact English), though, which uses all the words and sounds instead of the ASL syntax. So, he sings 'good' and 'think', then makes the 'ing' gesture, which is a swipe to the right of your pinkie. In ASL, this is a slang gesture for male genitalia, which is why Abby tells him he's not nice. I've never been able to catch the sing she used for Gibbs, though, since she doesn't fingerspell his name.
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Date: 2008-09-22 08:45 pm (UTC)