Definition of Quaalude in English:

Quaalude

Pronunciation /ˈkwāˌlo͞od/ /ˈkweɪˌlud/

noun

another term for methaqualone
‘People were doing these death drugs from harmless marijuana and LSD to heroin and PCP and Quaaludes.’
  • ‘It makes Quaaludes look like Flintstones chewable vitamins.’
  • ‘Flipper had a Vietnam veteran guitarist and played tragically funny dirge music, hardcore punk on Quaaludes.’
  • ‘In college, pursuing the zombie lifestyle, he washes down a dozen Quaaludes with Jack Daniels.’

Origin

1960s an invented name.