arkb 3leh
"Arkb 3leh" normally translates to "Ride on it," though many people use it referring to their male genitalia and use it similarly to how people say Kus Omak or fuck you. English doesn't normally have all the letters and sounds that Arabic has, so we use numbers that look similar to Arabic letters, such as 5, which is pronounced Kha, and 3, which is pronounced aa.
Guy 1: Dude Kus Omak
Guy 2: Arkb 3leh ya 5neeth
Guy 2: Arkb 3leh ya 5neeth