What does the british slang "wet blouse" mean?

Answer 1

I tried several slang dictionaries, and could not find anything under "wet blouse". I even tried to look up the words separately, but found nothing under blouse. I left you the UK slang dic website below. This is the only thing I found under wet.
wet Adj. Feeble, emotional, effeminate. Derog.

Answer 2

Wet Blouse