He keeps a jack and spare tire in the 'trunk'.
a 'trunk' full of clothes
the 'trunk' of an artery
(..) freaky friends of yours again. Never! Hiya, Harry. Ron. Fred. George. What are you all doing here? Rescuing you, of course. Now, come on, get your trunk. You better stand back. Let's go. -What was that? -What was it? Potter! (..)2002 Harry Potter and the Chamber of Secrets