Hatband

·noun A band round the crown of a hat; sometimes, a band of black cloth, crape, ·etc., worn as a badge of mourning.

dick's hatband
This very singular expression I have often heard in Rhode Island. Mr. Hartshorne calls it "one of th...

Dictionary of American Words And Phrases by John Russell Bartlett.
queer as dick's hatband
Out of order, without knowing one's disease. ...

Dictionary of The Vulgar Tongue by Francis Grose