1) Bookish 2) Cousin of wimpish 3) Dweebesque 4) Dweebish 5) Dweeblike 6) Far from cool 7) Far from phat 8) Geek-like 9) Geekish 10) Geeklike 11) Hardly cool 12) Hardly hip 13) Into chess and crosswords 14) Into cosplay, probably 15) Into role-playing 16) Like a dork 17) Like a dweeb 18) Like a nebbish 1) Dorky 2) Unhip 
Nerdy is slang for socially unacceptable behaviour.
of or like a nerd.