What does SEG mean?s**t Eatin Grin
Other definitions of SEG:
- Shit Eating Grin
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How to use the term SEG:
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More slang terms:
New Old Stock
An exclamation that is used to convey agreement or affirmation to a speaker, used as a word of encouragement.
A really shy kid who some how gets all the ladies. Always scared to try new stuff and gets worried very often. Also very intelligent and very active in sports.