If your thinking about doing this for scamming purposes know that there is an animation when you use the actual item.
I'm not very good with macros but here is a way you could set it up.
First copy and paste this script into your chat
Code:
/script DEFAULT_CHAT_FRAME:AddMessage("Shift-click this to place a link into a chat message: \124cff0070dd\124Hitem:44430:0:0:0:0:0:0:0:0\124h[Titanium Seal of Dalaran]\124h\124r");
Next run this script
Code:
/run CreateMacro("Coin",1,"/e casually flips his [Titanium Seal of Dalaran].",1,0)
getting rid of the "[Titanium Seal of Dalaran]" and putting the item link into its place.
Then manually go to your macro and on a new line add
Code:
/in 3 /e catches the coin heads up!
Its a bit sloppy but thats the way I know how to do it >.>.