Wiktionary
off-handed
a. 1 (alt form offhanded English) 2 Involving the use of the left or non-dominant hand. 3 (context mining now rare English) offhand.
Usage examples of "off-handed".
Tellai, releasing his snugger with off-handed ease that showed he was beginning to learn the ropes and anxious to prove it.
When you handed Hatch an uncompleted cheque made out to Oxo for him to sign in that off-handed and very unbusinesslike way that he probably imagined was appropriate to being rich, was it not with the clear intention of expanding ‘Oxo’ to Oxonia, adding the rest of the firm’s title and finally inserting the amount—a substantial amount—for payment?