See you in the funny paper[s] means "Goodbye, see you soon". A Dictionary of Catch Phrases (1986) by Eric Partridge and Paul Beale says: see you in the funny papers (—often and orig. I'll). 'This jocular farewell suggests that the person addressed is rather laughable: US: 1920s; extinct by the 1950s' (R.C., 1978). More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.