Top Definition
a variety/combination of sexual activities besides intercourse
"So what happened last night?"
"Ohh just a little bit of shmattering"

"Did you have a good time last night?"
"Let's just say he offered me a shmatter platter"

"What are you doing tonight?"
"It's Shmatterday, what do you think I'm doing?"
by Kate&Aimee September 22, 2009

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