It was something the Squadron Commander, Mancuso, was overly casual about, Ricks judged.
The use of Arabic numerals is considered overly casual for old-style dates.
It is a disappointing, overly casual arrangement for such a weighty aggregate of artwork.
They were overly casual ("It's free, right?")
And service, though friendly, can be overly casual and slow.
It came out after a hesitation, overly casual.
Just use your common sense and pick whatever suits you and you like, and that's not overly casual.
Hakuseki has been criticized for being overly casual in identifying the sources he used in writing.
They left the genetics building one by one: Thanthavong, then Satoshi, looking overly casual; Iphigenie, and Victoria close behind her.
Even if I hadn't already been suspicious, Don Bruce's response would have seemed overly casual.