Dashawn is a beautiful, loving, caring, kindful, helpful person you'll ever meet. Sometimes she will be annoying but just know that when you need her she'll be right there by your side. She can be sensitive at times but she will still find a way to put on a smile. Dashawn is a awesome person to hang out with. If you need a best friend ask Dashawn because she will be your life time best friend.
Used literally in the context of competitions in which the prize is to run around a shop (for 3 minutes, say) and everything you can chuck in your trolly you keep. Now used as a metaphor for coarse, undignified consumerist greed.
'what Posh n'Becks typify about modern Britain is their working-class-made-good Trolly Dash mentality'