A word you can say, as opposed to "okay" or "cool"; A conformation word.

Got the covid-19 vaccine

1.) good deal means awesome, cool, etc.
2.) good deal = drop it, when somebody is talking about something and you don't really care just say, "good deal, good deal" over and over again until they shut the fuck up.

Used by submariners as a way of describing death and server injury as a means to not come back to the sub.

Synonymous with good times.