build up a head of steam

(redirected from work up a head of steam)

build/get/work up a head of steam

to get enough energy, support, or enthusiasm to do something effectively
Usage notes: A head of steam is the pressure that is needed in the engine of an old-fashioned steam train to make it start moving.
In the last three months the campaign has built up a good head of steam.
See also: build, head, of, steam, up