A mile is a unit of measurement equal to about 1.6 kilometers, and a minute is equal to 60 seconds.

I have been thinking about your birthday.

Oh, what have you been thinking on a ah party?

A big party with 10 kinds of pizza and balloons, Maybe a clown and definitely chickens slowdown on a.

Your mind's going a mile a minute.

How about we start this party idea with something small, like a cake?

The expression a mile a minute means that something happens.

Way started using this phrase in the mid 19 hundreds, when 60 MPH or a mile a minute was considered a very fast speed, and that's English in a minute.