Word used by various gangsters, chavs and townies to define someone who is over paranoid, extreme, and is unable to "smell fires" - an old saying. This word can also mean someone who smells foul, or someone who finds someone smelling foul.
A: "Hey you Chetland"
B: "Nah bro whats your problem"
A: "You stink of S***"
Foolish individuals who wear shirts or possess other paraphernalia with the image of Che Guevara, Marxist-Leninist vermin known for his murdering of those who opposed communist revolutions and clown like utter incompetence when involved in combat operations against counter insurgency forces.
Chetards are frequently seen at Eco-conscious rallies, counter World Trade Organization demonstrations and gathered around bongs in college dormitories.
Did you see that Chetard in the photos from the demonstration? Luckily his unwashed, smellyhippie, patchouli funk was not captured in the picture.