The claw-like hand! The Singaporean (also Indian and Italian, I've noticed) old-dude way of "describing" things (usually food-related but not always) that are fucking good. A big stamp of approval.
No words required (sometimes they are simply not adequate). Just lift your hand, get your fingers to meet and flick your wrist ever so slightly, for emphasis.
We've got most of our Aussie pals into it now and I thought I should show you too because quite often, my waffling-on about some things on this blog can be reduced to this one hand gesture. So when you see "insert claw-like hand", you can assume that it's something so good that I can't find the words to describe it. That, or I'm being plain lazy. Haha.