achuntar

achuntar - to nail something, to hit the target (metaphorically or in real life)

Maca: Te apuesto que la Jésu no viene al carrete porque se va a juntar con Mario.
Vero: Puede ser...
(el día siguiente)
Vero: Al final se fue a otro lado con Mario. Lo achuntaste.

I bet you Jesu doesn't come because she's going to meet up with Mario.
Could be...
(the next day)
She ended up going elsewhere with Mario. You were right.

Chilenismo, coloquial