system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What does "ironic" mean?

I see people complaining about others using "ironic" wrong, and I don't understand any dictionary definitions. What does "ironic" actually mean, and how would you use it?
gpt
the expression of one's meaning by using language that normally signifies the opposite, typically for humorous or emphatic effect.

basically its a situation that you would expect the opposite of. 

rain on your wedding day is NOT ironic,

BUT, rain on your wedding day, if you were a meteorologist and specifically chose that day because you predicted it wouldnt be rainy *is* ironic.

other examples:

A roofer with a leaky roof.

There are roaches infesting the office of a pest control service.

A plumber spends all day working on leaky faucets and comes home to find a pipe has burst in his home.