dork

Short definition from Wiktionary

Noun

1. 1
   A quirky, silly or stupid, socially inept person, or one who is out of touch with contemporary trends and typically has unfashionable hobbies. (Overlaps conceptually with nerd and geek, but does not imply the same level of intelligence.)
2. 2
   The penis.
3. 3
   Alternative form of dirk (“a long dagger”).

Verb

1. 1
   To act or behave in the manner of a dork.
2. 2
   To act or behave in an awkward or clumsy manner.