offhand

The cards were laid on the table by him, and Hop picked them up in an offhanded way.

Yes; I think I knew even in his offhanded reference to comments on those that he was using Marxian terminology.

Poor little Jane adds, "These words told me offhanded and without preparation agitated my soul within me."

But Lou was jolly and frank and offhanded, while Ruth was painfully shy and reserved, and that was the secret of the whole matter.