A Talimancer is someone who is a fan of Tali's romance from Mass Effect. They can be catagorized in three different ways:
LUST:
1-These people have no intimate interest with the mass effect character. They just like her character.
2-These people will find Tali attractive. However, they usually have little sexual interest in her.
3-These will find Tali attractive and will often engage their mind in sexual fantasies about her. They will be intrigued by her alien features as they will usually be Xenophillics.
ARGUMENTAL:
1-Some will not defend Tali against Talibashers and will not argue 'How amazing Tali is'.
2-These Talimancers will often defend Tali against Talibashers who try to diminish Tali as a character. They will argue to get across their point that Tali is a great fictional character.
3-These make comments that are vulger or obsessive. These can be notions towards sexual fantasies about Tali, or spams about how amazing she is.
ACTION:
1-Some just like Tali as a character. They will take little interest in her beyond the video games and will only go as far as romancing her in most of their mass effect careers and making choices that benefit her.
2-All of above and more. They will constantly search for things related to her such as images and information about Tali. They may make fan art and make or read fanfictions based on Tali.
3-The Talimancers at this level will do all of the above and more. Their searches will often be of a more sexual nature.

The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands).

Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.”

There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.

A fan of Tali'Zorah and her romance from the Mass Effect series.

A Talimancer is a wild, rabid beast which is commonly encountered on the Bioware Social Network. They are unique animals since they are the result of an unfortunate occurence where a perfectly logical male gets infected by the Talimancus Romancus virus. This turns the human being to a drooling beast which crusades against everyone and everything who doesn't want to fuck Tali, or find out what her sweat smells like. Talimancers are pack animals who group together, and they prey on anyone who doesn't like Tali.

If you encounter one in the wilds, the best course of action is to ignore it. However, if it is aggressive and tries to come at you, play dead. If you fight back, the beast will call it's pack to help him, and then you are fucked.

One who is obsessed with a video game character Tali'Zorah from Mass Effect games.