A trademark "bully" may be described as a trademark owner that uses its trademark rights to harass and intimidate another business beyond what the law might be reasonably interpreted to allow.
The Department of Commerce (DOC) is requesting feedback from U.S. trademark owners, practitioners, and others regarding their experiences with litigation tactics, especially those involving an attempt to enforce trademark rights beyond a reasonable interpretation of the scope of the rights granted to the trademark owner.
The deadline for remarks is February 7th. Please visit the USPTO news item for specific information on how to respond.