WAP

Wet ass 'n pussy (alternative: Wet ars 'n pussycat).

Used in Northern England during the feudalism, mostly among the peasants, to say it's raining a lot or it rained a lot.

Burgess: It's bloody raining again, Alcott! 'Tis wet ars 'n pussy already outthere.

Alcott: You right 'bout that, 'tis bloody WAP.