Ironic, negative or surprising consequence/fact or Catch-22. Unexpected result.
Usually follows a positive statement. Used as bridging
statement for dramatic effect, to a negative consequence/statement.
Probably stems from the phrase
"you'll be kicking yourself
for this one"
an apartment is cheaper and gives you a lot of flexibility
around, but here's the kicker: with the money threw away renting
places for 5-10 years
you could have been well into a mortgage and have built up some personal equity, and credit.