GrOb

Grob may refer to:

• Grob Aerospace, a German aircraft manufacturer
• Grob fragmentation, an elimination reaction between an electrofuge and nucleofuge on an aliphatic chain
• GrOb or Grazhdanskaya Oborona, a Russian punk band

Grazhdanskaya Oborona (Russian: Гражданская Оборона, ), Russian for Civil Defense, or ГО, often referred to as ГрОб, Russian for coffin) were one of the earliest Soviet and Russian psychedelic/punk rock bands. They influenced many Soviet and, subsequently, Russian bands. From the early 1990s, the band's music began to evolve in the direction of psychedelic rock and shoegaze, and band leader Yegor Letov's lyrics became more metaphysical than political.

Grob Aircraft is a German aircraft manufacturer, previously known as Grob Aerospace. It has been manufacturing aircraft using carbon fiber reinforced polymer since the 1970s.