adjective, adverb, noun Informal.
Origin of incog
Examples from the Web for incog
The straw bonnet—you see people cannot tell whether you are not incog, as yet—'The Young Step-Mother|Charlotte M. Yonge
This Prince had been for some time in France; and tho' he was incog.The Memoirs of Charles-Lewis, Baron de Pollnitz, Volume III|Karl Ludwig von Pllnitz
Their dress is picturesque; and I have seen the Capitan Pacha, more than once, wearing it as a kind of incog.The Works Of Lord Byron, Vol. 3 (of 7)|Lord Byron
Abraham Lincoln, we like to think, was a typical American, but were one to encounter him incog.Idling in Italy|Joseph Collins
The old gentleman kept this costume for occasions when he goes to Brussels incog.Francezka|Molly Elliot Seawell