Green’s Dictionary of Slang

lemon (and lime) n.

[rhy. sl.]

1. time.

[UK]M. Coles Bible in Cockney 21: There is always gonna be lemon for people to plant their crops.
[UK]M. Coles More Bible in Cockney 11: We bloomin’ muck things up all the lemon-and-lime.

2. crime.

D. Shaw ‘Dead Beard’ at [Internet] Just to mark your card here, Dionne comes from a family in Lambeth which has been making a living out of small time lemon and lime since Oliver Cromwell was around.