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/Sounds like "mwehr" + "TEH" (as in "ten") + "roh" (as in "row")/

Meaning

In Colombia, a person who kills the vibe with their flat, negative, or draining energy. The moment a muertero walks in, the mood drops noticeably. No drama, just a slow, relentless energy drain that empties the room.

Examples

Invítalo si quieres pero es un muertero, va a bajar el ambiente.

Invite him if you want, but he's a total buzzkill, he will bring the whole vibe down.

Todos estaban animados hasta que llegó ese muertero.

Everyone was in a great mood until that muertero showed up.

Word family
Regional synonyms
Bandera de México
Bandera de Colombia
Bandera de Argentina
Bandera de Chile
Bandera de España
Bandera de Perú
Bandera de Venezuela
Aguafiestas

Bold, reckless, or just plain wild in an entertaining way: someone who does things nobody else would attempt without a second thought. Used in Colombia, Venezuela, and Ecuador for an impulsive, unfiltered person who acts first and asks questions never.