Bufford of Boston, which made this card around 1900, was a lithography company famous for various trading cards including ones of the presidents and also humorous ones such as this oddity.
All sorts of businesses, including tobacco and food companies, purchased the cards for advertising their products. This simple one with a slightly demented-looking young diner was probably designed to market food products or restaurant services.
This specimen would have carried an advertisement below the cartoon and probably on the back as well. The lower half of this card is blank as is its backside.
The card is discolored from age but has no major tears or creases. It measures 2 5/8" by 4 3/8".