Definition of mind-blower in English:

mind-blower

Pronunciation /ˈmʌɪn(d)ˌbləʊə/

noun

informal
  • Something that astonishes, shocks, or overwhelms; something (especially a drug) that alters one's consciousness, something that ‘blows one's mind’.

Origin

1960s; earliest use found in New Scientist. From mind + blower, after mind-blowing.