A person who is mentally retarded from sucking so much penis, frequently suffering from brain-freeze-of-cum, kinda like the brain-freeze you get with eating ice cream, but instead the brain-freeze is gotten from sucking dick.
That dyke beza sucktard, fo shizzle. Lets rizzle ma wizzle, nizzle, or I'll kizzle you, wizzle.
Sucktard is a mixture of "He sucks" and "He's a retard." Usually used as an epithet.
"Dude, that guy is a sucktard"
Someone who is bad at giving a blowjob, and is also retarded.
Dude, I had NO fun last night, she was a total sucktard!