What is the definition of Anniversary Pimples?

An 'anniversary pimples' is like the boogeyman of acne breakouts - a stubborn, stubborn reminder that time has been a thief, and your skin has been a victim of its thievery. These pimples are the bane of anyone who's had a particularly eventful year, turning their birthday into an awkward, red-faced spectacle.

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Here's an edgy sentence using that term: "On my 30th anniversary, I found my anniversary pimples were bigger than my ego and I couldn't decide between a new lipstick or a new acne cream."