to mount a horse, to hit the road
Vou alçar a perna e ir embora antes que escureça.
I'm gonna hit the road before it gets dark.
Literally 'to lift the leg.' In gaucho horsemanship alçar a perna is the act of swinging the leg up and over to mount the horse, and from there the meaning extended to 'to set off, to head out.
Falando's Idiom Trainer teaches you to recognize idiom meanings and create sentences using them, so you can speak like a Brazilian.
