On Wheels Meaning

(idiomatic, postpositive) To a large degree, excessive.

Example: 2005, Joy Fielding, Puppet (Simon and Schuster, ISBN 0743488008), page 181:
  "That prosecutor seems like a real bitch on wheels," Amanda says […] .
Mobile; able to be moved.
1881, Helen Hunt Jackson, A Century of Dishonor, chapter V:
  The order was written. In less than ten days everything was "on wheels" and the whole body of these Sioux [was] on the move to the country they had indicated, and the Secretary of the Interior says, naively, in his report for 1868, "The Indians were found to be quite determined to move westward, and the promise of the government in that respect was faithfully kept."
Used other than as an idiom: see on,‎ wheels. (Having wheels affixed to the bottom, and so transportable.)