Where does “crazy-ass” come from?

crazy-ass (English) comes from English ass, from Middle English asse, from Old English assa, from Old English assen, from Latin asinus, from Latin acinus, from Latin acies, from Proto-Indo-European h₂eḱ- — sharp.

crazy-ass (English): very crazy

Definitions

  1. very crazy

Ancestry of “crazy-ass”, step by step

crazy-ass traces back through two separate lines of ancestry.

via English ass

StepLanguageWordMeaning
1EnglishassAny of several species of horse-like animals,...
2Middle EnglishasseAlternative form of axen
3Old Englishassaass, donkey
4Old Englishassenshe-ass
5Latinasinusa donkey, an ass; an ass, an idiot, a dolt, a...
6Latinacinusa berry, especially the grape; the seed of a...
7Latinaciessharp edge or point; battle line; battle,...
8Proto-Indo-Europeanh₂eḱ-sharp

via English crazy

StepLanguageWordMeaning
1EnglishcrazyFlawed or damaged; unsound, liable to break...
2Englishcrazecraziness; insanity; A strong habitual desire or...
3Middle EnglishcrasenTo break in pieces; to crack
4Old Norsekrasato shatter
Every word from Proto-Indo-European h₂eḱ-Every word from Latin aciesEvery word from Latin acinus