不登大雅之堂

1. • lit. not fit for elegant hall (of artwork)
2. • not presentable
3. • coarse
4. • unrefined

Character by character

• 不(bù)no
• 登(dēng)scale
• 大(dà)big
• 雅(yǎ)elegant
• 之(zhī)(possessive particle, literary equivalent of 的 de)
• 堂(táng)hall