To muster up

Related to To muster up: pass muster
to gather up; to succeed in obtaining; to obtain with some effort or difficulty.

See also: Muster

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
My journey with FitM8 has come to an end and so, I have to muster up all of the willpower and motivation I can to step out into the world of fitness alone.
The muster, as it is called, refers to the days when local fire departments were made up of volunteers, and departments had to muster up enough men to fight a fire effectively.