Wrong foot is defined as off to a bad start or making a bad first impression.
(noun)When you meet your in-laws for the first time and you accidentally insult them by implying that they are ugly, this is an example of a time when you got off on the wrong foot.
See wrong-foot in Webster's New World College Dictionary
transitive verb
Origin: < the practice in sports of causing an opponent to put weight on the wrong foot
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