Persicaria perfoliata; Polygonum perfoliatum; Asiatic tearthumb; kudzu of the North. / Kudzu; Pueraria lobata; Pueraria montana var. lobata / Ipomoea cairica, a species of morning glory

At the rate of one mile per minute, 60 miles per hour.

Very fast

plural of mile-a-minute

A rate of sixty miles per hour.

(informal) Very quickly.

plural of mile a minute

(idiomatic) To speak quickly or excessively.