To send an explicit all be it unwelcome text message or picture message to a female which you are trying to "beat up." This message may contain any of the following: a picture of the penis, genitals, or any other explicit image or message.
Attributed to arguably one of the best quarterbacks to ever play in the NFL yet can never decide when to hang them up, Brett Favreing it simply means to wear out your welcome.
Example: " Chris has drank the rest of our beer and is now eating our food, that dude is completely brett favreing it (or being a brett favre)."