Used when calling names at people (they are usually kids) who use to set up and play Habbo retros, the illegal private servers of Habbo Hotel, a kind of chatbox with virtual rooms and virtual furniture.

The habbotards are usually in the age 12-14.
Often have played RuneScape before 'exploring the world of Habboons'.
Habbotards appear to get a hardy of seeing pixelated furniture and 'coins', which they use to buy virtual furniture for their virtual room on the Habbo private server. (a 'retro')

Habbotards have barely any knowledge about what they are doing, they are following other peoples tutorials which are put on forums such as RaGEZONE.

Those tutorials have titles like '(TUT) (NOOB-FRIENDLY) (SET UP HABBO RETRO IN 10 MINUTES)', which exactly shows the low-level knowledge required for setting up a 'Habboon nest', basic computer knowledge and overall noobness.
However, Habbotards like spamming each other's threads and calling each other noob.

Often called a Habboon, but Habbotard is pretty regular too.

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 contraction of "Habbo retard". It's used to define a person or group of people who play in a popular chat called "Habbo Hotel", they are usually internet losers who must mask the fact that they don't have their own personality or social life.

A Habbotard it someone who is seen to be adicted to the online game Habbo Hotel.

The word origianaly came from forums.

The word it also a play on the word Retard.

A habbotard is a massive fag who only play's Habbo and has no knowledge of doing anything but playing on Habbo. By playing, we mean going to adoption centers and claiming to be a baby. These usaully come from forums after there 2 rubber ducks on Habbo were stolen. There vry dangerous people and Habbotardastius is very catchy.

Stay away from people with Habbotardastius.

These people don't have any social life and are probably on Habbo or Habbo Retros to try and get more furni. These Habbotards will only have rubber ducks and z shelfs.