its when you stick your dick inside a girls ass and slowly take it out to reveal a perfect circle that is the exact diameter of your shlong.
"yo bit i stuck my dick in her ass last night and pulled that shit out and took a pic of her zeglin...shit was so big"

by dalez March 14, 2007
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A delicious sandwich combination in which you place a single piece of bologna on top of a piece of white bread. After doing this, you then must add yellow mustard to the sandwich in a spiral fashion. Depending if you have it, cheese can also be added.
Chase: "Yo dawg, is that a Zeglin Foldover your eating there?"

Casey: "Why yes it is, and it's quite scrumptious!"
by Dale Zeglin September 11, 2008
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