(in Japan) a young person who is obsessed with computers or particular aspects of popular culture to the detriment of their social skills.
‘every other otaku can run on about their hobby endlessly’
1 A foolish or contemptible person who lacks social skills or is boringly studious.
‘I was a serious nerd until I discovered girls and cars’
1.1 A single-minded expert in a particular technical field.
‘a computer nerd’