Yalla.com was registered back in 1997, it expired at GoDaddy and closed for a whopping $170,888. Yalla is registered in 189 extensions according to DotDB.com.
There are developed websites at Yalla.live and several other sites using the name. I have seen definitions of Hurry Up in Arabic.
It will be interesting to see if this price gets paid and if so, who the buyer is at this price.