Q. Please clarify for non-United Kingdom folk:

quid = pound(s)
crimbo = ?
busk(ing) = ?

Thanks Oracle!

Ah yes, there were a few people from the States and Scandinavia who also asked this question.
A quid is one pound, Chrimbo/Crimbo is another name for Christmas and busking is performing music on the streets for money. You can be moved along by police in many areas so it's worth checking before you venture into this! FYI: London Underground allows a number of artists to perform at certain pitches; before 2003 it was actually illegal.