Being or like a nerd.
‘That guy is nerdy and weird.’;
Relating to things (such as clothing) that are typical of students at prep schools.
Of, pertaining to, in the style of, or appealing to nerds.
‘That is a nerdy song.’; ‘I got a pair of nerdy glasses and clothes for Halloween.’;
(US) A student of a prep school.
Preppy (also spelled preppie) or prep (all abbreviations of the word preparatory) is a youth subculture in the United States associated with old private Northeastern college preparatory schools. The terms are used to denote a person seen as characteristic of a student or alumnus of these schools.