This seems a good way of treating it.

koj, daijr, daijs, nikk, shinmeikai

i don't think it means any of those.  and it has to be glossed as a noun.  it's just used to emphasize the thing that precedes the 〜の.  the gg5 entries are very likely too harsh for こんこんちき itself; the harsh translation seems to be derived from the rest of the sentence

@@ -11,5 +11,5 @@
-<pos>&exp;</pos>
-<s_inf>usu. as ～のこんこんちき</s_inf>
-<gloss>big</gloss>
-<gloss>stupid</gloss>
-<gloss>cuckoo</gloss>
+<pos>&n;</pos>
+<s_inf>emphatic or mocking word, usu. used as ～のこんこんちき</s_inf>
+<gloss>thing</gloss>
+<gloss>person</gloss>
+<gloss>situation</gloss>

daijs
３ 人や物事の状態などを強調したり、冷やかしたりする語。「それが大騒ぎの―なのさ」
_
でも、あなたはいやな老いぼれの —— 老いぼれのコンコンチキだわ」
But I think you are a horrid old--old flibbertigibbet."  - O 
Henry『最後の一枚の葉』

an attempt

@@ -12,5 +12,9 @@
-<s_inf>usu. XXのこんこんちき..</s_inf>
-<gloss>bloody</gloss>
-<gloss>goddamn</gloss>
-<gloss>fucking</gloss>
-<gloss g_type="expl">expression which emphasizes the derogatory or ridiculing statement which precedes it</gloss>
+<s_inf>usu. as ～のこんこんちき</s_inf>
+<gloss>big</gloss>
+<gloss>stupid</gloss>
+<gloss>cuckoo</gloss>
+</sense>
+<sense>
+<pos>&n;</pos>
+<xref type="see" seq="1267340">キツネ・1</xref>
+<gloss>fox</gloss>

Hi, since this word is used in the Japanese translation of Harry Potter books, I doubt it can mean anything as strong as this definition suggests.

not sure about the note, with the XXs and the ..