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es un asco

is disgusting

→ ser
phrase Rare #28,265
is disgusting Colloquial. Can also mean "it sucks" or "it's awful" depending on context.
SP: Este café es un asco.
EN: This coffee is disgusting.

Malditos forenses que no vienen, esto es un asco.

Damn forensic experts who don't show up, this is disgusting.

— Memories of Murder (Crónica de un asesino en serie) (2003)

Es un asco estar resfriado.

It's awful having a cold.

Tatoeba es un asco.

Tatoeba is disgusting.

Dile que su novia es un asco.

Tell him his girlfriend is disgusting.

— Crazy Rich Asians (2018)

Creía que la anarquía podía ser interesante pero el tío es un asco.

I thought anarchy could be interesting, but the guy is disgusting.

— La ola (2008)

Es un asco.

It's disgusting.

— Crudo (2017)

Huele a orina y es un asco.

It smells like urine and it's disgusting.

— It (Eso) (2017)

La vida en una granja es un asco.

Life on a farm is awful.

— Los siete samuráis (1954)