French and impressive as thought by Del Boy from British television sitcom "Only Fools and Horses".
Direct French translation is Shower Cap.
Direct Spanish translation is Gorro de ducha
When you feel like sharing with others something you really like, you say "Bonnet de douche"
El Zorro: Hey BigBawski did you see that MILF that just went by?
BigBawski: Indeed! Bonnet de douche!