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When your group of friends have a conversation about useless aspects of modern society or over-analyze aspects of interactions with the opposite sex.
Dan: Then she told me to have a great weekend. Should I ask her out?
Jason: She's just being nice. She's a cashier.
Dan: There was a look.
Jason: Man, we're totally Seinfelding right now.
by docbuzzo June 06, 2016
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2
When a group of people challenge each other to see who can go the longest without masturbating.

The name originates from the Seinfeld show where the whole gang sees who can go the longest with doing it. Elaine ends up winning.
"The tension in the group had become unbearable. They had been Seinfelding if for a month now, and only Steve had backed out."
by masterblaster603 December 20, 2009
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The act of violently humping or grinding on someone whenever the Seinfeld theme tune is played.
Man, Randall got involved in some intense Seinfelding last night.
by Kmacbmx October 26, 2016
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