Such an interesting word.
One of its definitions is:
“A protruding part; an outward curve or swelling“.
Most of us associate it with putting on a bit of weight and feeling that out trousers are filled to capacity.
That would fit another definition:
“A sudden, usually temporary increase in number or quantity”.
In 1944 there was The Battle of the Bulge.
In astronomy a bulge is a tightly packed group of stars within a larger formation.
On a TOTALLY UNRELATED note, here a picture of Lucas North:
You know what can cause bulges?
Hands in the pocket:
Then there are those unexpected bulge dangers lurking about…