苦瓜老姨西瓜老叔

'Bitter Melon Auntie and Watermelon Uncle,' a playful pairing using two contrasting fruits, bitter melon which tastes bitter and watermelon which tastes sweet to represent two personalities. One person is compared to a bitter-tasting plant, often linked humorously to someone perceived as sharp or harsh, while 'watermelon' may describe somebody sweeter, cooler, and calmer. 'Old aunt' and 'old uncle' indicate respect towards elderly family figures or someone older acting maturely within one's life circles.