* may also be spelled, Yalla.
To use it as "Yallah, let's go" would be invalid as Yallah means lets go.
You could use it this way;
"Yallah (name/nickname of person you are speaking to) _____"
or simply; "Yallah!"
Arabic word for come on! or Let's Go! Used by people who have lived in the arab world in any contact.
Yallah, let's go!
Yallah, I'm waiting!
Ok, I'll talk to you later. Yallah, bye.
the word can mean okay too
yallah samy, see ya on monday
which means : okay samy, see ya on monday