Awesome game.
But you could have googled them
this is too hard - Win in singleplayer
<censored> - Gives 10,000 wood
Ya gotta make do with what ya got - Spawns the Mediocre Bombard at your Home City gather point
Sooo Good Turn on - “Musketeer’ed!” when you get killed by Musketeers
Speed always wins - Turns on 100x gather/build rates
A recent study indicated that 100% of herdables are obese - Fattens all animals on map
Nova & Orion - Gives 10,000 XP
Give me liberty or give me coin - Gives 10,000 coin
Medium Rare Please - Gives 10,000 food
X marks the spot - Reveals map (fog of war still there)
tuck tuck tuck - Spawns a big red monster truck that can run over anything
Shiver me Timpers! - Destroys all the enemy boats on the map
Where's that axe? - George Crushington
a whole lot of love - Gives 10,000 of all resources (including export)
Source : http://www.gamespot.com/age-of-empires-iii/cheats/