User blog comment:Feeling-Chalant/The Aftermath of Depths/@comment-96.241.72.70-20120611005751

It refers to the pairing of Nightwing/Zatanna. Dick tells her in Season 1 that he was trying to be nonchalant at one point. She uses his habit dropping prefixes from certain words (think "whelmed") and says that he can be as chalant as he likes. Cute, huh?