"estar o andar a full" means that you are doing tons of things at the same time.

"full" is not a Spanish word.

Noralia, how do you say it? (I suppose that "full" is borrowed from English, because there aren't any other Spanish words that come to mind that end in ull.)

Natasha said:

Noralia, how do you say it? (I suppose that "full" is borrowed from English, because there aren't any other Spanish words that come to mind that end in ull.)

"Full" is not Spanish! It's borrowed from English and you pronounce it with a Spanish /u/ sound, but it's the English word. These days it`s used a lot in Argentina in different contexts with different meanings. One is combined with the verbs "estar" o "andar" as in the example.

You can also find it in a dialogue like this:

Are you going to the concert tonight? ¿Vas a ir al recital hoy?
Of course! Obviously! No doubt! A full!

hola a todos, soy de argentina y queria responder la pregunta. Como bien saben "Full" es una palabra en ingles. para nosotros andar a full es como decir "ir con todas las ganas" es como poner enfasis al verbo, tambien lo usamos en este ejemplo: -Vamos a tomar una cerveza. .-si a full!!!!! es como si dijera, Si!!!! vamos con todo!!!.
Bueno espero haberte ayudado.

Gracias a todos me han ayudado mucho.

Curioso, en ESpaña no se entendería esta expresión.