This is the 8337th most frequent Spanish word.
potra
"Potra" means "female foal" or colloquially, "good luck."
Here, 'potra' refers to a young female horse, which is its primary and literal meaning.
Esa potra corre muy rápido.
That filly runs very fast.
In this context, 'potra' is used colloquially in Spain to mean 'luck' or 'good fortune'.
¡Qué potra has tenido al ganar la lotería!
What luck you've had winning the lottery!
In this example, 'potra' is metaphorically used to refer to talent or skill in a specific context.