• Lumun@lemmy.zip
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      12 days ago

      I think it refers to a cap (hat), because culturally when you take off your cap it means you are being truthful. Similar to the term “hat in hand”

      I looked into it more and seems like the origins of cap meaning to lie is unclear. So looks like I was off base

      • caoimhinr@lemmy.world
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        11 days ago

        I thought it referred to the “kappa” emote on twitch which conveys sarcasm (/s basically), so no cap = no sarcasm intended.