I heard someone say "pai" in Cantonese, but what does this mean? What's the use of "platoon"

"Having a queue" means spending a long time "queuing", whether it is Cantonese or Hong Kong dialect. There is not much difference. Cantonese spoken in Guangzhou and Hong Kong is basically the same.

For example:

"There are lines that bother you."

It means: you have been bored for a long time.