It's an informal style of singing that is very popular with ordinary Iraqis.

NPR: In Baghdad, a Rare Musical Performance

The school adopted an extremely informal style in which pupils could do what they liked: mathematics or football, English or tie-dyeing.

ECONOMIST: Plowden��s progress

Along with Jean-Luc Godard, Francois Truffaut, Claude Chabrol and Jacques Rivette, all former film critics, he helped pioneer an informal film movement that turned traditional notions of narrative and style on their head.

CNN: STORY HIGHLIGHTS

But Lord Lawson said the prime minister should not be aping the style of his Labour predecessor - known for his "sofa-style" of government in which key decisions were made by an informal group of close advisers.

BBC: David Cameron 'should learn from Thatcher not Blair'

Trusts which are investment vehicles unique to China with little in common with Western-style trust firms enabled banks to stay below their loan quota by using an informal type of securitization to repackage bank loans as investment products.

WSJ: China's Lending Spills Over Limits

The bank apologised for what it called an "edgy and quirky" e-mail, saying the tone of the newsletter was a hallmark of its informal style with its young, upwardly mobile customers.

BBC: NEWS | Business | Web bank rapped for 'edgy' email