What does "roll in" mean?

Retire for the night, as in It's time to roll in—we'll see you in the morning.

Add, as in She tried to roll in several new clauses, but the publisher would not agree.

Arrive, flow, or pour in, as in The football fans have been rolling in since this morning.

Enjoy ample amounts of, especially of wealth, as in Ask the Newmans for a donation—they're rolling in money. This idiom alludes to having so much of something that one can roll around in it (as a pig might roll in mud). It is sometimes put as rolling in it, the it meaning money. [Late 1700s] Also see roll in the aisles; roll in the hay.