Dork
来自Big Physics
1960s (originally US): perhaps a variant of dirk, influenced by dick1.
wiktionary
US 1960s, sense of "silly person" presumably from earlier use as bowdlerization of dick(“penis”) in student slang, particularly Midwest. [1] [2] [3] [4]
Alternative etymology derives from dialectal Norwegian dorg(“a mass; heap; a heavy, dimwitted, slovenly person”).
Uncertain; apparently from Scots. See dirk.
etymonline
dork (n.)
"stupid person," 1967, originally U.S. student slang, perhaps from earlier meaning "penis" (1964), itself probably an alteration of dick (n.). Related: Dorky; dorkiness.