五角六张/ 五角六張 wǔjuéliùzhāng (also wǔjiǎoliùzhāng, wǔjuélùzhāng) unlucky and unsuccessful
A metaphor for things not going well or encountering bad luck. Historically refers to an old belief that the fifth day of a cycle falling on the 角 jué mansion and the sixth day falling on the 张 zhāng mansion were unlucky days for business or travel.