To have contracted or be infected with venereal disease(s), often in reference to prostitution or numerous sexual partners. (19th Century slang).
I wouldn't goto to bed with her, I think she's frenchified.
to take a word and make it french by way of pronounciation or ending.
Also to become more french though mannerisms, dress, political views, and the like.
Have you seen Brittany or Tom lately? They got all frenchified after spending a semester in France.