(verb) to ensure that figures agree with each other or reflect accurate arithmetic; used in reference to multiple figures provided in the same analysis, as in: “Let’s make sure all the numbers in the document foot, they didn’t add up last time”; this jargon is a truncation of “footnote” and trades on vague associations with the word, specifically that sources are contained therein, and that the presence of a footnote implies a level of analytical rigor that merits the placement of one