The term 'osterizer' does not seem to be a recognized slang term in the Spanish language. It appears to be the brand name of a kitchen blender. In some regions, it might be used as a colloquial term to refer to a blender, due to the popularity of the brand.
Examples
- Spanish: Por favor, pon las frutas en el osterizer para hacer un batido.
- English: Please, put the fruits in the osterizer to make a smoothie.