I don't mind trying my hand at these, and more if you like, but I can't get all of your last batch. Here is what I understand:
1.What's that toast to the flickas?
I don't understand this; where did you get these? I.e., perhaps they are from another part of the English-speaking world than the U.S.?
2.on good behaviour
Example use: "Johnny, your grandmother is coming over tonight, and I expect you to be on your best behavior--absolutely no cursing, and no running around like a puppy dog."
Actually we don't use "on good behavior" currently in the US (in my experience), but we do use "on your best behavior", and I'm sure it is the same thing. It means to act politely. It is most often used of children.
3.I'm fluffing on a busted flush
I don't know what the verb means. In draw poker, if have four hearts and 1 club, and you discard the club in hopes of drawing another heart (which would give you five hearts, which is a flush, a very good hand in draw poker), and you don't get a heart in the draw, you have a busted flush (ie, not really a flush at all).
4.I don't take a powder at a clem
I have no idea what this means.