Moth wings/butterfly wings
Wild mushroom caps
Shark fin/dorsal fin
Ears (fox, wolf, dog, cat, etc)
Migrating ducks in flight
Slices of pie, cake, pizza, etc.
Pool ball rack
Triangle (musical instrument)
Ice cream cone
Rewind, play & fast forward symbols
Road hazard cone
Top of milk cartons
Toblerone chocolate bar
Synonyms: Wedge, pennant, quoin, beaked
Describing a shape is best done in as few words as possible. Think of the shape as a camera snap shot--you want to capture the gist of what you mean as soon as possible so you can get on with other related (and more important) detail, and the action happening in the scene
A weak example:
The sun blocked out as Fat Joe bumbled up, holding a hot dog in each hand, a nasty red burn branding his chest. Oh if only the mob boss could see him here at the beach, his tiny wedge of a Speedo hiding beneath his sprawling gut like a piece of candy corn. "Hey Tony, extra onions, just like you asked," he says, waving one of the foil-wrapped dogs at me.
What's wrong with this example?
Candy corn doesn't scream mobster--it screams pedophile.
A strong example:
The sun blocked out as Fat Joe bumbled up, holding a hot dog in each hand, a nasty red burn branding his chest. Oh if only the mob boss could see him here at the beach, with his wedge of a Speedo hiding beneath a sprawling gut like a slice of old pizza trapped under a sofa cushion. "Hey Tony, extra onions, just like you asked," he says, waving one of the foil wrapped dogs at me.
Why does this work?
Old pizza is a much better comparison, both in content, the size and the image it brings about.