Tippex-thinner (noun phrase)
1. (minor, colloquial) A solvent used to make old or dried out Tippex easier to spread on paper.
2. (major, universal) A legal hallucinogenic abused by naughty 80s-90s school children, inhaled by drenching school tie with said substance.
"I love long walks on the beach with my girlfriend, until the Tippex-thinner wears off and I realise that I'm just dragging a stolen mannequin around a Lidl parking-lot"