spread (something) under (someone or something)

spread (something) under (someone or something)

To open, stretch, or unfold something and lay it out underneath someone or something else. Spread a tarp or some newspapers under you while you're painting. I don't want any getting on the floor! I have a canvas that I spread under my workbench. That way, I can pick it up at the end of the day and just shake all the metal shavings and debris out into the dumpster.
See also: spread
Farlex Dictionary of Idioms.

spread something under someone or something

to extend or unfold something, such as a tarpaulin, beneath someone or something. Please spread some newspapers under Jimmy while he is working this clay. Would you spread some newspapers under your work, please?
See also: spread
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • (someone or something) promises well
  • a/the feel of (something)
  • (I) wouldn't (do something) if I were you
  • (have) got something going (with someone)
  • a straw will show which way the wind blows
  • accompanied by
  • accompanied by (someone or something)
  • accompany
  • a crack at (someone or something)
  • all right