I only know a few, and I would really like to learn some more. If anyone can recommend a source, or just post proverbs on here, I'd be very grateful.

This one is fun, because it can be messed around with:
弱肉強食 (jaku niku kyou shoku - weak meat strong eat - survival of the fittest)

What's fun is that people sometimes jokingly order 弱肉強食 in a restaurant, when what they mean is:
焼肉定食 (yakiniku teishoku - a set meal with grilled meat)

In Cloud Atlas, David Mitchell has one of the characters (not Japanese) say 'The weak are meat, the strong do eat', and it's pretty clear (though he never overtly says so) that he's taken the Japanese proverb as a model. Especially given the time he's spent in Japan. Not a problem, and it was fun to spot, but the proverb always makes me think of the book now. Good book.

Posted By: asmodai

えええ、people really mix up じゃ and や in pronunciation? :|
To me that's such a huge difference in the pronunciation that I'd not soon make that mistake.

I think you misunderstood. It's not so much a mistake as a deliberate play on words. I haven't tried ordering that way myself, so I'm not sure how the waiting staff would react - I assume most of them would pick up on it, though.

Nice! I've heard of yojijukugo before, but I've never actually seen an idiomatic one before. Just told my girlfriend we are 異体同心 and she got very 嬉しい ;)

Posted By: Richard

This link was pretty interesting for finding a whole lot of yoji jukugo.

http://www.manythings.org/japanese/vocabulary/kh-yojijukugo1.html

I went through them with the matching activity, which I think might be best, because you can work out the answers with a little effort (all good for learning, right?) Although the sheer number of compounds is rather overwhelming.

My favourite one from here was 'temae miso' (手前味噌) which means 'to blow your own trumpet', deriving from showing off about your home-made miso apparently, though I had to find the derivation on Google.

If you say お手前味噌ですが or simply お手前ですが, it's like saying "I don't want to show off, but ..." - great for getting into the spirit of Japanese modesty.

Posted By: silvabriggs

would 一期一会 be applicable in this case? It's less proverbial and more idiomatic, but ...

Absolutely, those four kanjis are considered one word (just search for ichigoichie on jisho and you'll see it as a definite result) so it's absolutely considered a yojijukugo.