step up

step up (third-person singular simple present steps up, present participle stepping up, simple past and past participle stepped up)

1. (transitive, idiomatic) To increase speed or rate.

   They will need to step up production if they are going to compete.

   • 2012 May 13, Alistair Magowan, “Sunderland 0-1 Man Utd”, in BBC Sport‎:

     United were made to pay for letting an eight-point lead as little as five weeks ago slip and, despite their final-day efforts, they will look back on a season where, when they needed to step up, they fell flat.

From step up to the plate (“take one's turn at bat, take responsibility”)

step up

1. (intransitive, idiomatic) To assume responsibility; to volunteer or offer.

   Won't anyone step up to the challenge?

   • 2011 January 8, Chris Bevan, “Arsenal 1 - 1 Leeds”, in BBC‎:

     The Gunners continued to press after the break but it was Leeds who broke the deadlock in the 54th minute. There was no doubt about the penalty either, with Denilson clumsily fouling Gradel and Snodgrass stepping up to find the bottom corner of the net.

• uppest, upstep