Trying to ridicule a person or thing by repeating twice, but during the second repetition replace the first consonant(s) with s-h-m.
Often used by speakers or decendents of people who speak Yiddish and German. Since a lot of words an names start with shm.
Hugo: You know you really shouldn't do that any more. You might go to prison.
Chester: Prison Shmison.
Hugo: No seriously man. I think I saw a cop.
Chester: Cop shmop
Hugo: You know, that doesn't always work. You can't solve all your problems by word shmerding them.
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.