THIS IS HOW NUNU WHUPS ***. This is my guide to playing AS/AD Nunu, which imho is the only way to play Nunu

PROS
[*] FAST!
[*] unexpected
[*] able to stick on people
[*] not very much mana comsumption late game
[*] YOUR A FRICKEN YETI
[*] good vs physical damage dealers

CONS
[*] sqiushyer early game
[*] not as good vs ap
[*] Not much damage on ult: becomes more of a cc
[*] NOT FRICKEN GAREN> CANNOT TANK WHOLE TEAM

For runes I take
[*] Greater Mark of Desolation.
[*] Greater Seal of Fortitude.
[*] Greater Glyph of Strength
[*] Greater Quintessence of Alacrity.

I take these runes because they give me more damage output as well as added surviability

For masteries I go 21/0/9 taking the improved exhaust and AS/AD talents in offense. I also take two in archmage's savvy because Nunu can benifit from some ap and i had leftover points.IN the utility tree i took improved ghost, imporved regen and greed. i took these because they allow you to run/catch an enemy, or survive. plus who doesnt want more money :)

For items i take a Phantom Dancer, two Bloodthirsters, A starks fervor, and a Warmogs.
you may be wondering why i get the warmogs. two reasons really
Surviability and regen
The survivablity is because i like living and the regen is nice for staying alive too

For summoner spells I take
[*] Ghost
you can get away from people or you can chase sombody down. this should allow you to stick onto people.
[*] Exhaust
this is nice if yoy are fighting a physical damge dealer or you have to nuke someone hard!

let me get this in your head now. YOU WILL NOT FARM VERY GOOD EARLY GAME. once you get some AS you will farm better and then it will get better. :) try at first to harras enemy champions until they have to back. that is when you push. when they are sitting passivly in the background, get what farm you can.

As i said before, YOU MUST HARASS. it is good for you and your laning ally and bad for the other teams lane. you want to also make sure that when you Consume a minion that you do it on one that is near full health. this will let you harder, as well as leading to a very easy minon kill.
Some good people to lane with early game for kills would be tryn yi etc.
if your looking to survive more than kill i would suggesst going with a support if you can.
I HIGHLY discourage going with a tank. you wont be able to secure as many kills and will be pushed back to your turret A LOT!

You want to stay i your lane as long as posssible if you have the upper hand. if you do not have the upper hand i would suggest either getting it or, if an oppertunity presents itself, GANK! you want to keep the enemy trying to counter you because you are either carrying or locking down thier carries. this will benefit your team immensly, not to mention annoy your enemies.

SO GO OUT THERE AND PWN SOME FACE WITH YOUR YETI FISTS OF FURY!