Any person who is not developmentally disabled, but rather has what is considered normal cognitive faculties but for whatever reason has opted out of using it. Whereas mental retardation is genetic in nature, this form of behavior is environmental usually resulting in too much daytime television, Brittany Spears piped in pop music, and other environmental factors.
That dude right there with the five kids he took to see the movie Basic Instinct Two who has an InSynch ringtone blaring through the movie theatre drowning out the lame dialogue is a tard. (2) That tard who thought he could drive a mile in front of me and cut in front of all of us in traffic is definitely a tard. (3) The fact that dude just asked who wanted to chat in a chat room is a citizen of Tardania.
Someone who is NOT retarded, but, acts like they are because they are too busy fantasizing about stupid bullshit to pay attention to the reality that surrounds them.
Chad : Oh Kiersten I love to kiss your neck it makes me so hard!
Kiersten : Keep doin it then after work we can find a room and fuck!
Steve: Hey guys what's goin on!
Chad : Can't you see I'm making out with my girlfriend get lost!
Steve : Oh mind if I join in! LOL
Kiersten : Get lost you creap!
Chad : Yeah get lost before I kick you stupid ass!
Kiersten : What a fuckin idiot!
Chad : Yeah he's such a Tard!
TARD an acronym for Trump Acceptance/Rejection Disorder. A serious contagious mental disorder that spreads by contact with fake news and communist university professors.