Can anyone see a problem with a domain name with "kik" in it Eg: kikmybro.com. The site would be based around the kik messaging service. Thanks in advance for your thoughts.
With a domain like KikMyBro.com that's based around the kik messaging service, than yes, there would be a problem.
It depends on how litigious Kik is, or might be in the future. If you can make a buck instantly and aren't building a long term business then it's possibly worth the gamble.
I would also agree, that sounds like a TM problem. Kik already has a TM on that name associated with their service. Therefor, if the name has Kik in it and contains anything related to their services, it's a TM violation.
Just because you are promoting or utilizing their services, you are still breaching their trademark without permission. Email KIK and ask them. That will be the only answer that counts.