趾高气扬做最棒的菇凉好吗
[zhĭ gāo qì yáng zuò zuì bàng de gū liáng hăo ma]
'Be arrogant, and will you become the best mushroom girl?' This sounds more like casual teasing or sarcasm, especially the addition of mushroom (菇凉), which sounds like saying girl ('gu niang'). So here, this can be used when talking about an arrogant girl, or it’s just a quirky way of describing a determined individual.