Green’s Dictionary of Slang

paper adj.

SE in slang uses

In compounds

paper-collar (adj.) [SE paper collar, as worn by clerks pretending to superior elegance]

[mid–late 19C] (Aus./N.Z./US) used to imply social superiority, real or otherwise.

paper mushrooms (n.) [the hallucinogenic qualities of certain mushrooms, i.e. paper n. (13a)]

[1980s+] (drugs) LSD, esp. that which has been dropped onto blotting-paper.

paper skull (n.) (also paper scull) [lit. ‘one with a paper-thin skull’]

[late 17C–early 19C] a fool; thus paper-skulled/-sculled adj., foolish, simple.

paper yabber (n.) [yabber n.]

[late 19C–1930s] (Aus.) a letter.