fuck knows

Etymology
Probably a shortening of "who the fuck knows"

Phrase

 * 1)  I don't know; nobody knows; it is unclear.
 * Fuck knows what we'll do now the car's broken down.

Translations

 * Bulgarian: хуй знае
 * Finnish: en minä vittu tiedä, vittuako minä tiedän
 * French: aucune putain d'idée
 * Maltese: fejn iż-żobb naf
 * Polish: chuj wie
 * Romanian: pula știe
 * Russian:
 * Spanish: ni puta idea