To be found here: http://forum.candlekeep.com/topic.asp?TOPIC_ID=13403
Some fun selections (by me

“Baldurian” – Common:- a term applied to the collective folk of Baldur’s Gate, their work, study, beliefs, and customs, and to items of their making (Polyhedron #74)
“Brittle Bones” – Common:- a term for humans used by orcs (Polyhedron #74; also collated in Lore from the Sages)
“spellslinger” – Common:- a slang term for a mage (Magic of Faerûn by Sean K. Reynolds, Duane Maxwell, Angel McCoy)
“Whisper something in a Harper ear, and all Faerûn'll know it before the moon passes” – Common:- a folk saying (The Code of the Harpers by Ed Greenwood)
“Wizards? Avoid ‘em. Life’s better when ye’re not a frog” – Common:- an anonymous trail saying of the Sword Coast lands (Volo’s Guide to All Things Magical by Ed Greenwood, Eric L. Boyd)