1
general::
Phrase(s): speed someone or something up
to cause someone or something to move faster. • We tried to speed him up, but he is just a very slow person. • We sped up the process, but it still took too long., Phrase(s): speed up
to go faster. • Please speed up. We are late.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Accelerate, expedite, increase the rate, as in The car speeded up as it went downhill, or It's difficult to speed up production without new equipment. [Late 1800s]
American Heritage Idioms