frost up

frost up

1. To become coated with a thin layer of ice. If the ground frosts up tonight, we'll have a much harder time digging into it tomorrow.
2. To cause something to become coated with a thin layer of ice. In this usage, a noun or pronoun can be used between "frost" and "up." I'm worried that the cold temperatures tonight will frost the ground up.
See also: frost, up
Farlex Dictionary of Idioms.

frost up

v.
1. To become covered with frost: The windows frosted up quickly when the temperature dropped.
2. To cause something to become covered with frost: The freezing air frosted up the windows. Our breath frosted the mirrors up.
See also: frost, up
The American Heritage® Dictionary of Phrasal Verbs.
See also:
  • frost over
  • frosted over
  • frosting
  • ice up
  • ice over
  • fog up
  • punch into
  • punch into (something)
  • penetrate
  • penetrate (something) with (something)