Semedar is a pseudonym. It's main user (and perhaps it's only user) is a person named Victor Villa. He came upon this name back when EQ was big. Ever since he used this pseudonym everywhere he went. You can just Google "Semedar" and 99% of the matches are from him. Often abbreviated "Seme" (Sem-e)
Refering to the size of an article of clothing (usually a man's shirt) where the article is clearly bought one size too small as to display one's musclularity. Usually worn but not limited to bars, clubs, or social gathering where high numbers of attractive females tend to congregate. Commonly mistakn for a shirt you stole from your 12 yr.old brother.