Green’s Dictionary of Slang

1. to rain, rainwater.

2019		P. Baker Fabulosa 296/1: parnie, parnee 1. rainwater.
2023		R. Milward Man-Eating Typewriter 37: The roof leaked when it parnied.

2. to cry, to weep; tears.

2019		P. Baker Fabulosa 296/1: parnie, parnee [...] tears.
2023		R. Milward Man-Eating Typewriter 110: ‘If it [i.e. being sodomised] doesn’t make you parny, darling, you’re not doing it right!’.

3. to urinate, to ‘make water’.

2023

R. Milward Man-Eating Typewriter 18: Please try to refrain from [...] vomiting, ejaculating, parneying, barneying, rioting.