Green’s Dictionary of Slang

chintz n.

a bedbug.

1865		G.A. Sala My Diary in America I 227: I have been in scores of American hotels and lived in furnished lodgings, but fleas or bugs, or ‘chintzes’ [...] never assailed me.
1885		G.A. Sala in Daily Tel. 14 Aug. in DSUE (1984).
1966		B. Jackson Get Your Ass in the Water (1974) 211: One night as I awoke a little wee chintz spoke to me as I raised my head. / He said, ‘Don’t you get rough and don’t you get tough, for you and I both must share this bed.’.