dickhead

• dick-head

From dick +‎ head. Attested since the 1960s, with the jerk sense appearing earliest.

• enPR: dĭkʹhĕd, IPA^(key): /ˈdɪkˌhɛd/
  • (colloquial) enPR: dĭkʹĕd, IPA^(key): /ˈdɪ.kɛd/

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English Wikipedia has an article on:

glans penis

Wikipedia

dickhead (plural dickheads)

1. (vulgar) The glans penis.
   • 1970, Clarence Major, All-night Visitors, page 71:

     ...down, down, sinking down faster than she's so far moved, the dick head exploding up into all that wet, warm slime...

2. (vulgar, derogatory, offensive, synecdochically) A jerk; a mean or rude person.
   • 1965, Robin Moore, The Green Berets, page 242:

     I don't want them Special Forces guys left out there when some dickhead is afraid to go get them.

   • 1996, Timothy Jay, What to Do When Your Students Talk Dirty, page 207:

     ...they have been exchanging insults in writing: "dickhead," "dillweed," "fuzzbutt," "dorkwad," "asswipe," and so forth.

   • 2022, “Question...?”, performed by Taylor Swift:

     She was on your mind with some dickhead guy
     That you saw that night

3. (vulgar, derogatory, offensive, synecdochically) A stupid or useless person.
   • 1979, E.M. Corder, The Deer Hunter, page 69:

     "Watch it, dickhead!" "Hey, Stan, that's my shirt you just dropped in the snow!"

• (glans penis): see also Thesaurus:glans.
• (jerk): see also Thesaurus:jerk.
• (idiot): see also Thesaurus:fool or Thesaurus:idiot.