What is Tie Crack?
The butt-crack like shape within the triangle of a neck-tie when tied by incompetent tyers. Is often a sign of amateur tying or careless tying demonstrated by people in too much hurry to get to their important tie-demanding jobs.
Is that a plumber unclogging chest hair from Peter's collar? No wait, it's just a tie crack. He sure is a hairy bastard though.