[Idiom] What does "stay upright" mean?

[qortnwls0328]

What does the expression "stay upright" mean?

It is used as "there's no reason you should stay upright."

And can I use the expression in this way? "That thing should stay upright."??

 

[bhaisahab]

What does the expression "stay upright" mean?

It is used as "there's no reason you should stay upright."

And can I use the expression in this way? "That thing should stay upright."??

Have you looked up the words in a dictionary?