It can show several emotions such as, happiness, anger, scaredness, just to name a few. Saying "A La Verga" by itself, not in a sentence, is kinda weird, it just translates to "to the dick"
Vete a la verga - Fuck outta here
Callate a la verga - Shut the fuck up *car explodes*A LA VERGA - Holy fuck Me gane un carro a la verga- I won a fucking car
Me vale verga - I dont give a fuck Que te valga verga - Dont fucking worry about it
Me pelan(s) la verga - You guys aint shit compared to me
Te pasas de verga - You fuck around too much
literally in English, it means "to the dick," but in when used in Spanish it means "oh fuck!" This can be used to express excitement, madness, panic, or happiness, among other emotions.
Elías is happy and excited that he won the lottery. He yelled, "A LA VERGA!!!! I just won the lottery!"
Melissa heard a loud noise in her kitchen one dark night. She said "A la verga!! What the fuck was that?"