fasten up

Related to fasten up: fasten down

fasten up

To secure or close something, as by using buttons, zippers, etc. A noun or pronoun can be used between "fasten" and "up." It's freezing today, so be sure to fasten up your coat.
See also: fasten, up
Farlex Dictionary of Idioms.

fasten something up

to close something up, using buttons, a zipper, snaps, hooks, a clasp, or other things meant to hold something closed. Please fasten this up for me. I can't reach the zipper. Please fasten up my buttons in back.
See also: fasten, up
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • load in
  • turn down
  • involve with
  • involve with (someone or something)
  • involved with
  • arrange for
  • arrange for some time
  • arrange some music for
  • back into
  • back into (someone or something)