1. [early 19C+] (also coolly) calmly, in an unruffled manner.
2. [late 19C] askance, suspiciously.
3. (US black) very.
[1940s+] (orig. US black) to act in an uninterested or disinterested manner, to control every emotion.
[1950s–70s] (US) a phr. of farewell.
[mid-19C+] to relax, to remain undisturbed by events.