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1.
adj. Obvious or absurd, such that it is reminiscent of NBC's "Seinfeld."
Arguing about the relative size of marshmellows is undeniably Seinfeldian.
by The Grammar Nazi July 11, 2002
 
2.
You know you are a Seinfeldian if you argue over the top of a muffin, which marsmallow is bigger or something stupid like that.
by Cool Guy July 18, 2003
 
3.
Person who follows the teachings of Seinfeld
Stan: Do you celebrate Festivus?

Jan: Yes of course I do, I'm Seinfeldian, it's our holiest day.
by Blue Carbuncle June 19, 2011
 
4.
tedious or obsessive to the point of being ridiculous
She has such high standards for men that her objections are practically Seinfeldian.
by Whitney February 06, 2004
 
5.
adj - to describe a chain of dates. To keep motivated to do an activity every day, Jerry Seinfeld used a large calendar and a big red marker. Everyday that had success got a big, red "X". The secret? “Don’t break the chain.” “Don’t break the chain.”
Max is still going to the gym everyday since he started using that Seinfeldian chain.
by OBI Serious September 04, 2007