Are you right-handed or left-handed?

Leftie here.

Does 'ambidextrous' mean both right handed and left handed?

Left handed at writing, right handed at throwing, right footed, left handed at pool and snooker, right handed at racket sports, ambidextrous with scissors! Mighty handy.
You can get two pieces of paper cut at a time with the proper clamping.
It's great!

Stupid righty

Right handed. Run of the mill.

My friend who is a leftie writes in the most unnatural position where he has his hand in almost 90 degree angle to his arm. I do feel for them considering there might be long term problems in store for him if he continues to write in such a position.