Wiktionary
a. Not businesslike.
Usage examples of "unbusinesslike".
That note, scribbled in pencil, sent through the matron, was unbusinesslike as well as cruel, and decreased at once the value of the woman who had written it.
They are so unbusinesslike, we could make them do anything by judicious management.
No stable could long survive the absence of both its main driving forces, left as it was in the hands of a kind unbusinesslike woman with too little knowledge.
I had notes in my pocket-book, and I marshalled my facts, and gave, I flatter myself, a very businesslike statement of my own unbusinesslike ways and lamentable position.
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?