This week’s “Slang This!” contestant is literary historian Jack Lynch, author of The Lexicographer’s Dilemma: The Evolution of ‘Proper’ English, from Shakespeare to South Park. He tries to guess the meaning of three slang terms: one throat to choke, pickleback, and step-ins. By the way, Lynch is an associate professor of English at Rutgers University, has published his own helpful guide to grammar and usage. This is part of a complete episode.