Or resident troll seems to be moving to more offensive behaviour:
Link now removed as the user seems to have been removed and the URL contained the offending language.
Flag any of their content with a custom "requires moderator attention" flag.
If they don't have any content, flag any of your own with the same. Be as descriptive as possible. Moderators can see the full text of your flag, so flagging one of your own posts with a custom flag is the best way to flag something which has no other anchor points to flag.
A validated custom flag on one of your posts has no negative repercussions for you in itself, it does not by itself count against you in any way.