I looked it up.
Seeing and at times just thinking about cockroaches makes a person feel squeamish and repulsed. When dreaming about these dreaded insects, the unconscious mind may be hinting to the dreamer that he needs to reevaluate and reassess a major part of his life. There is never just one roach; thus, the areas of life that need cleansing and renewal may be deep and wide. The negativity or contamination that is represented by the roaches may affect a great deal of your life. Thus, this may be a call to clean your psychological, emotional, and spiritual self. (Also, examine your motives!) On a less dramatic note, cockroaches in our dreams may be associated with food and uncleanliness, so don't leave the dishes for tomorrow!
Source: Dream Lover Incorporated, http://www.dreamloverinc.com
There you go.