Those Dudes, Those Guys
noun
If a 奴 is just some dude or some guy, adding a ら on there makes it plural. Now it's those dudes or those guys.
やつら
The reading comes from 奴.
奴ら、俺たちは働いてるってのに、呑気に日光浴なんかしてやがるぜ。
Those guys are bathing and relaxing in the sun while we are working.