look (a bit) black over Bill's mother's

To look likely to rain, as due to a dark and cloudy sky. You better get that stuff off the lawn—it's looking a bit black over Bill's mother's. It's looking black over Bill's mother's so bring an umbrella with you.

See also: black, look, over

See also:

(a bit) black over Bill's mother's
coming up a cloud
mow one's lawn
mow the lawn
It's for a fact
piss down
piss it down
not college material
that way
knee

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