Target: meaning of "wet week"

[The DeFranks <defrank@VOICENET.COM>]

I am reading a novel called Almonds and Raisins by Maisie Mosco about Jews
who moved from Russia to Manchester England in the early 1900s.
Twice they have referred to a "wet week":  "Why've you got a face like a wet
week?"
What does this mean? A search on Google did not good, as I thought from the
start! Neither does Scholastic's Dictionary of Idioms.
Any ideas?

Karen DeFrank, LMS, RAA coordinator, and resident bottle washer
Bullock School
Glassboro. NJ 08028

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-==-=
All postings to LM_NET are protected under copyright law.
To quit LM_NET (or set-reset NOMAIL or DIGEST, etc.) send email to:
listserv@listserv.syr.edu   In the message write EITHER:
1) SIGNOFF LM_NET 2) SET LM_NET NOMAIL or 3) SET LM_NET DIGEST
4) SET LM_NET MAIL  * Please allow for confirmation from Listserv.
For LM_NET Help see: http://ericir.syr.edu/lm_net/
Archives: http://askeric.org/Virtual/Listserv_Archives/LM_NET.shtml
 See also EL-Announce for announcements from library media vendors:
    http://www.mindspring.com/~el-announce/
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=