look up any word, like smh:
 
1.
slang term used in reference to alcohol belonging to a friend
example one:
"all the teachers in the pub,
passin round the ready rub,
trying not to think of when,
that lunch time bell will ring again"
(baggy trousers by the madness)

example 2:
"ey john, pass some ready-rub"
by C.C.Buzzcock February 22, 2011