three squares a day

three squares (a day)

The three nutritionally complete meals (in one day), that is, breakfast, lunch, and dinner. A steady income, a place to sleep, and three squares a day—going into the military was the best decision of my life! Trying to get three squares into my toddler each day feels nigh impossible sometimes.
See also: square, three
Farlex Dictionary of Idioms.

three squares a day

Informal
Three square meals eaten in a day.
See also: square, three
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • three squares
  • three squares (a day)
  • three musketeers
  • three cheers
  • three cheers for
  • three cheers for (someone or something)
  • three score and ten
  • a hat trick
  • hat trick
  • three-strike(s) rule