Currently on a few CoD games, it is a banned clantag for the consumer except the creators. The only way through getting it is hex editing one's clantag which is fairly easy.
IW stands for Infinity Ward. Also used for short to reference to Infinity Ward.
Online Friend:FUKING IW!!
Me: You mad bro? What's wrong?
Online Friend: I CAN'T USE IW AS MY CLANTAG!
Me: Here, I'll hex edit your CT.
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug