Si te descubren, ya valiste.

[morbrorper]

English

If you are found out, you’ll catch it.

Is this a regional use of valer?

[amadeoncio]

English Translation

If you are found out, you’ll catch it.

Exactly. The idea of the expression is like saying: You value (or worth) nothing

[MistahMartinez]

Yes it is, not used in Spain.