大姨夫请管好你媳妇
[dà yí fū qĭng guăn hăo nĭ xí fù]
'Uncle, please watch over your wife!' can serve as playful, teasing nickname among acquaintances. In the family hierarchy, 'dà yí fu' refers specifically to husband of elder maternal aunt while 媳妇 xí fu means 'daughter-in-law'. However using these terms here seems intended humorously to refer to managing a partner.