If you have to ask, the answer is no. But to be fair (and since someone else would call me out on that anyway), here's a quote from the Terms of Service:
Prohibited Content
In addition, you may not use the Site to upload any of the following:
- Non-anime: Photographs of American porn actresses, for example, are prohibited. Photographs of cosplayers, figures, or prominent figures in the industry are acceptable.
For example, the search cosplay photo.