"You can have a coke" is a more socially and publicly acceptable way of saying "you can s my d
Can also be combined with lol-cat-speak for "You can haz a coke" or "A coke -- you can haz it".
Bon Qui Qui at King Burger:
Customer: Can I get a #6 with a cookies & cream milkshake?
Bon Qui Qui: You sure you don't just want a coke?
Bon Qui Qui: Then I gotta get the ice cream out, put some cookies all up in it. I don't even know how to use that blender, they got me pressin' all these crazy buttons. No, you can have a coke.