a shorthand form of "neck beard"- a usually nasty area of thick facial hair under the chin covering the neck region. Usually sported by someone who can't grow a full beard
That guy's neckard is hella disgusting.
Your girlfriend's father, who happens to be very short. Referenced in Jim Gaffigan's stand-up comedy.
Its never a good idea to pick up your girlfriend's dad, if he's very short and treat him like a baby..."It's a BABY DADDY!!!WHEEEEEEEEE!"