(random derogatory slang term)+("tard.")
In addition to an inability to control this behaviour, the typical tardtard also lives under the delusion that they are being quite witty and/or original.
Unfortunately, the game was won long ago by the brilliant inventor of the original- that venerable old standby; "fucktard."
Nothing since has ever come close, and it is surely not for lack of effort. But every tardtard believes that they will someday coin the next "fucktard," and bask in the immortal glory.
The tardtard is most commonly encountered on Urban Dictionary itself, and is second most common in junior high.
- Pfft! FYI, I have just defined dweebtard, faptard, knobtard, mingetard, mongtard, rofltard, and scrotard- and until you interrupted me, I was...
-Double-u slash e, tardtard.
-I'm not a "tardtard"... you... bitchtarded... dorktard!