Black over Bill's mother 

Said when it's likely to rain soon.

'Look at those clouds, it's a bit black over Bill's mother, methinks.'

Black over Bill's mother by Aurelien July 10, 2006

It's a bit black over Bill's mother's 

A phrase used when you can see dark clouds in the distance, esp. in summer.

Used in North West England, and possibly other places as well.

"Nice clear sky, isn't it?"

"It's a bit black over Bill's mother's though."

It's a bit black over Bill's mother's by Pak the Destroyer January 8, 2010

black over bills mothers house 

It will rain shortly, expect rain in the next 20 minutes or so.

Q. Shall we have a picnic Ginger?
A. No Sedgewick, it's black over bills mothers house.

black over bills mothers house by John Stevenson June 10, 2004

Black over bills mothers house. 

To see a dark rain cloud on the horizon.

look its "Black over bills mothers house."

Black over bills mothers house. by Galube aka Shit Eyes...... June 12, 2010