Means literally 'do me a favour'.  The lemon part is Cockney rhyming slang, and is short for 'lemon flavour', so in other words it's really "do me a lemon flavour"
The usage is mostly to reject an offer or behaviour of some kind, due to its being undesirable in some way (as opposed to actually asking for a specific favour).
The usage is mostly to reject an offer or behaviour of some kind, due to its being undesirable in some way (as opposed to actually asking for a specific favour).
by NoMoreSecrets January 1, 2008
 Get the do me a lemonmug.
Get the do me a lemonmug. Rare but recorded London phrase for 'Do me a favour'. Totally mystery origin, unless you know the answer.
by David from Kingsbury April 28, 2006
 Get the do me a lemonmug.
Get the do me a lemonmug. Quite simply this is another way of saying "Do me favour". However this version tends to be used by people who live in and or frequent London, England.
Often it is used to express disbelief in what someone is saying .
Often it is used to express disbelief in what someone is saying .
#1 Do me a lemon, and give me a lift to the pub.
#2 Do me a lemon, there's no way he said that you absolute muppet.
#2 Do me a lemon, there's no way he said that you absolute muppet.
by Gazcap June 3, 2024
 Get the Do me a lemonmug.
Get the Do me a lemonmug.