Spanish vocabulary · Beginner
How to Say Crazy in Spanish
Loco · adjective · LOH-koh (masculine) / LOH-kah (feminine)
Loco (feminine loca) is the most common Spanish translation of crazy. It can describe genuine mental instability, but in everyday speech it more often conveys excitement, recklessness, or affectionate teasing.
LOH-koh (masculine) / LOH-kah (feminine)
Estás loco si piensas que eso va a funcionar.
You're crazy if you think that's going to work.
Crazy in Spanish: Quick Reference
Below are the most common Spanish words for crazy, with pronunciation and regional usage notes.
| Spanish | English | Pronunciation | Region / Register |
|---|---|---|---|
| loco | crazy | LOH-koh (masculine) / LOH-kah (feminine) | Default, widely understood |
| loca | crazy | feminine form | |
| demente | crazy | formal / clinical tone | |
| chiflado | crazy | informal, humorous |
How Native Speakers Use Loco
Real example sentences across three contexts you'll actually run into.
Informal reaction
¡Qué loco! No puedo creer que haya saltado desde ahí.
That's crazy! I can't believe he jumped from there.
Used as an exclamation to express disbelief.
Describing passion
Mi abuela está loca por las telenovelas.
My grandmother is crazy about soap operas.
Loco/a por means crazy about or passionate about something.
Formal register
El informe describe al paciente como demente.
The report describes the patient as demented.
Demente is preferred in medical or formal contexts over loco.
Avoid These Mistakes When Using Loco
Gender agreement
Incorrect: Ella es loco.
Correct: Ella es loca.
Loco must agree in gender with the subject; use loca for feminine nouns and pronouns.
Wrong verb pairing
Incorrect: Estoy loco por ella. → Soy loco por ella.
Correct: Estoy loco por ella.
Use estar (not ser) with loco when describing a temporary emotional state or infatuation.
Why Crazy Matters in Spanish-Speaking Cultures
Lock in Crazy Vocabulary with the Parrot Method
Why word lists alone don't stick
Memorizing a translation feels productive, but most learners forget 70% of what they studied within 48 hours. Vocabulary needs spaced repetition AND real-world exposure to transfer to long-term memory.
See Loco used by native speakers
Parrot's short-form videos feature native speakers using loco in real situations. Context-based exposure beats flashcards, you hear Estás loco si piensas que eso va a funcionar. while watching someone live the moment, connecting meaning, sound, and rhythm at once.
Save, review, repeat, stay consistent
Tap any word to save it. Parrot's spaced-repetition system surfaces it right before you'd forget, no manual flashcard creation. The watch, parrot back, save, review cycle turns recognition into fluency at 2.7x the speed of traditional study.
Common Questions About Crazy in Spanish
- Is loco offensive in Spanish?
- Among friends it is usually lighthearted, but in formal or clinical settings it can be insensitive. Use demente or enfermo mental when discussing mental health seriously.
- How do I say 'to drive someone crazy' in Spanish?
- The most common phrase is volver loco/a a alguien, e.g., Esa música me vuelve loco (That music drives me crazy).
- What does a lo loco mean?
- A lo loco is a colloquial expression meaning recklessly or without thinking, e.g., Gastó el dinero a lo loco (He spent the money recklessly).