the.com/slip of the tongue

Your brain hits send before proofreading the message.

means An unintentional speech error where you say something other than what you meant to say, often revealing what was actually on your mind.

from Simple and literal: 'slip' as in a small mistake or stumble, 'of the tongue' naming the body part responsible. The phrase has been used in English for centuries to describe verbal missteps. It got a famous boost from Freud's idea of the 'Freudian slip' — the notion that these slips aren't random but leak out suppressed thoughts — though Freud himself used the German term Fehlleistung ('faulty action'), not this English phrase.

freud's take
thought it reveals your actual secret desire
science's take
similar-sounding words just collide in your brain
classic example
calling your new partner by your ex's name
fancy name
linguists call it a parapraxis
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