Ni ahí
Not a chance, no interest whatsoever, nowhere near — flat refusal delivered as a measurement of distance.
Related lesson: Uruguayan Spanish: A Survival Guide.
Hear it in context
—¿Vas a ir a la fiesta? —Ni ahí, mañana laburo temprano.
'Are you going to the party?' 'Not a chance, I'm working early tomorrow.'
A mí ni ahí me interesa el fútbol, andá vos.
Football doesn't interest me in the slightest — you go.
Ni ahí se parecen, son dos cosas distintas.
They're nothing alike, they're two different things.
What It Actually Means
Ni ahí covers three related jobs: refusal (ni ahí voy — I’m absolutely not going), indifference (ni ahí me importa — I could not care less), and shortfall (no llega ni ahí — it isn’t even close). All three run off the same image: the thing in question is not merely absent, it is not even in the vicinity. It is one of the most-used dismissals in Uruguay and among the most useful things to recognise, because it will be aimed at you sooner or later.
Where It Comes From
Literally “not even there”, from expressions of the shape no llega ni ahí — it doesn’t even reach that far. Rioplatense compressed the phrase and let the surviving fragment carry the whole negative, which is why ni ahí works with no other negative word in the sentence. It is not exclusively Uruguayan: Argentina uses it just as much, and it should be understood as shared Rioplatense rather than a border marker.
How Natives Use It
Bluntly. It is the honest answer between friends, it is common among young people, and it is short enough to be a whole turn in a conversation. It combines with the local kit freely — ni ahí, bo — and it does not soften: there is no diminutive, no polite variant, and no way to say it gently. When Uruguayans want to be kind they use something else.
Common Pitfall
Two things. First, register: this is a refusal for peers, not for an invitation from a colleague’s mother. Answer a formal offer with ni ahí and you have not declined, you have dismissed. Second, do not add a second negative — no me interesa ni ahí is redundant and marks you as translating. The phrase already contains all the negation the sentence needs.