STOWAWAY

One who gets a free ride

• 'Slug off?

• Accidental tourist?

• Certain freeloader

• Free rider

• Freeloading passenger

• Groucho, in Monkey Business

• Hide in a hold

• Illegal passenger

• Non-paying passenger

• One who goes free?

• Seagoing freeloader

• Shipboard hider

• Unexpected passenger

• Unticketed traveler

• A person who hides aboard a ship or plane in the hope of getting free passage