once over lightly

once over lightly

Very quickly, cursorily, or carelessly. Hyphenated if used as an adjective before a noun. It's clear that the repairs were done as cheaply and once over lightly as possible. The senator assured reporters that this will not be a once-over-lightly investigation.
See also: lightly, once, over
Farlex Dictionary of Idioms.

once-over-lightly

 
1. Fig. a quick and careless treatment. (A noun. Said of an act of cleaning, studying, examination, or appraisal.) Bill gave his geometry the once-over-lightly and then quit studying. Ann, you didn't wash the dishes properly. They only got a once-over-lightly.
2. Fig. cursory; in a quick and careless manner. (An adverb.) Tom studied geometry once-over-lightly. Ann washed the dishes once-over-lightly.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

once over lightly

Cursorily, quickly, as in I did go over the program once over lightly, but perhaps I should read it more carefully. [Colloquial; mid-1900s]
See also: lightly, once, over
The American Heritage® Dictionary of Idioms by Christine Ammer.

once over lightly

1. mod. quickly and superficially; carelessly; cursorily. (This is hyphenated before a nominal.) He looked at it once over lightly and agreed to do it.
2. n. a perfunctory examination; a quick glance. Once over lightly is not enough.
See also: lightly, once, over
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • once-over-lightly
  • dooper
  • duper
  • double or nothing
  • round robin
  • a round robin
  • flat chat
  • flat strap
  • eleventh hour
  • heads I win, tails you lose