Good Luck With That Edit Meaning

1.

Phrase where you don't really care what happens, you're just glad it's not you who has to do the said person's task.

DUDE 1: My Mom wants me to go on a diet where I have to eat only lemons and cabbage and drink only prune juice.

DUDE 2: Good luck with that. (Thinking: Haha! Loser!)

See good luck, carry on, git r done

2.

Wishing luck to a person or many people that are going to become unlucky.

A man walking down a busy street passes gas and as he does so he says in a soft voice to the people walking by him "Good luck with that"

See busy, gas, down, man, soft, walking