Template:Skype
<skype action="chat" style="noimage" >{{{nick}}}</skype> <foobar arg="blat">Template:My template</foobar>
but you can work around it with the #tag parser function that converts tags into parser functions:
lang="js"
↓
Content of MediaWiki:Common.js
<skype style="noimage"> action="chat" </skype>