Quincy, all I want to do IS trademark my companies slogans like these others have done. What I am gathering from the forums here is that unless someone sees the slogans and can identify it with my company name it won't work. The slogans that I mentioned of which other companies have secured a trademark for are slogans that are used by many other T-Shirt companies a ton. I can almost guarantee that even though they have the trademarks now they were indeed not the first to use the slogans on shirts in fact they may not have been the 7th or 12th for that matter they just happened to trademark those slogans before anyone else. Also, the "Merry Christmas Ya Filthy Animal" was made popular in the movie "Home Alone" and "****ter's Full" is from the movie National Lampoon's "Christmas Vacation.
A lot of phrases used on tee-shirts will be taken from movies - and that can be okay if the holders of the rights in the movies have not developed their own product line and are not marketing their own goods using those phrases (which is often the case - think of the Disney line of products connected to Disney movies). It is the same as taking short phrases from books and using them. The only problem can be if a current rights holder objects to the use and decides to assert whatever rights they think they have.
All a trademark does, Basikboy, is to identify a business or product or service. Nothing more. As soon as you start marketing goods or services in commerce under a name, you have a trademark. How protectable the trademark is will often depend on the name that is chosen as the identifier.
In order to federally register a mark and have it placed on the Principal Register, the mark must start off as a distinctive and original identifier of a business, a product or service (like "Kodak" and "Adidas" and "Microsoft") OR it must gain recognition as the identifier of a business, product or service over time, when consumers start to connect in their minds the trademark with a particular business, product or service (like "McDonald's" and "Kentucky Fried Chicken" and "Speedy Printing").
It is possible you have rights in your works, as justalayman mentioned in your other thread, but you need to enforce these rights if you wish to keep them. You can file DMCA takedown notices if you find your original and creative artwork is being used by others, or you can send cease and desist letters if you find the phrases with designs on your tee-shirts that you started marketing first are being used by others.
Again, being original and creative with your trademark (your business identifier) and with your products (your tee-shirt designs and phrases) can go a long way to ensuring you are not sent cease and desist letters. You, instead, can be the one sending them to others when you assert your rights.