It means "I am fast".
In English there is no difference between "I am fast" if the speaker is male or female.
In Arabic you have to differentiate between both genders. Therefore, we said in Arabic
Enni Saa'm as a male speaker. (إنى صائم)
Enni Saa'emah as female speaker. (إنى صائمة)
One more thing when you ask "What is the meaning of ..." in Arabic you can say.
ما معنى not ما معنا
It ends with ya ى
However, thank you for elaborating this question. BTW, what about these videos :).