If you say I am "bullish" is means that you consider the market to be in an up tread, or put simple you believe prices will go up.
To be "bearish" is the opposite, meaning that if one is "bearish" on the market then one would believe the market is on a down tread, or heading to lower prices.
For more help on learning more about trading, I can recommend this site: Investopedia.com
I hope this helps, and good luck on your journey.