A Space Raider, Invader or interventionist spanning mainly the last decade in Invading the earth. An off planet being or Alien who lacks KNOWLEDGE. Colloquial slang also meaning YUL. Cockney rhyming slang is 'Yul Brinner' Grinner.
Let remove those YULs. They are not here for humanities benefit.
Which the same as 'Lets remove those Grinners' , ' Your Just a Grinner'