"A giant's wedding" - a hullabaloo, a chaotic situation. Can be used to describe a tavern brawl, a disastrous melee, or a good party (or all three at once).
"A troll's gift" - a white elephant, an unwanted responsibility
"There's never just one goblin" - can be used either in an exasperated, "when it rains, it pours" sense, or as a word of warning when less sensible folk are ready to let down their guard.
"Chant without drums" - empty talk, bluster, especially hollow saber-rattling
"Gone over the mountain" - either literally far away or figuratively a little crazy, out there
"A fellow with two clans" - someone untrustworthy, a double dealer.
But: "a dwarf for all clans" - a universally liked and trusted individual, a man for all seasons
"Bread without beer" - something incomplete or insufficient
"An ettin's secret" - common knowledge
"An ettin's marriage" - a situation in which too many people are involved; too many cooks spoiling the soup; the presence of a third wheel
"You should get some sun." - Take a long walk off a short pier. Go away.
"You don't forge steel in the home fire." - to encourage daring and heroism.
"Stale air" - Old hat
"Words on paper" - a meaningless statement, a promise without value
"Iari's well" - Pandora's box, or a situation with no foreseeable resolution.
"Fishing in Iari's well" - engaging in a hopeless endeavor
I love "Shale!"
