Origin: 1400–50; late ME prest(e) < MF prest, OF, n. deriv. of prester to lend < L praestāre to perform, vouch for, excel (ML: to lend), lit., to stand in front. See pre-, stand
prest money
–noun BritishObsolete.
a sum of money advanced to men enlisting in the navy or the army, given to bind the bargain and as an inducement.