What does ( Helal Olsun ) mean ?

http://forum.wordreference.com/threads/helal-olsun.1214299/

http://www.seslisozluk.net/en/what-is-the-meaning-of-helal-olsun/

Is ´helal ol´ a shortened form of ´helal olsun´ without the -sun imperative suffix?

İt means "like your own ware" in English

For instance : I am eating my food and

you ate my food than you didn´t say me, so this is "haram"

İf you ate my food after you say me, so this is "helal"

What s the difference between Kal and Dur?

Kal = Stay

Dur = Stop

You can see the difference.