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Phrase(s): square something up
to cause something to have right angles. • Please square the door frames up better before you nail them in. • Can you square up this box a little better?, Phrase(s): square up (for fighting)
to get ready for an argument or a fight. • John was angry and appeared to be squaring up for a fight. • When those two square up, everyone gets out of the way.
McGrawhill's American Idioms And Phrasal Verbs