"duck fat lolly"

 "a strange joyful glitter"

" the Beatles belch out a popular song"

"a brown study"

(i came across it in Wuthering Heights)

 The Meating Room

Mancheese

(names of restaurants - one in the UK, the other in Buenos Aires)

 Royal Bottomers

 "Alexa Popworld Erasure Ointment" is likely a creative or metaphorical phrase related to pop culture commentary, possibly referring to a way of forgetting or removing something from pop culture consciousness, but it is not a real product.