泪挂在眼角流不下来泪含在眼眶滚不出来
[lèi guà zài yăn jiăo liú bù xià lái lèi hán zài yăn kuàng gŭn bù chū lái]
It's a vivid expression for extreme sadness, frustration, or grief, portraying tears hanging at the edges of one's eyes or in the eye sockets, but not yet falling down. This portrays a state of being on the verge of crying, unable to let emotions flow freely.