A nonenterprising person who is not paying his way.

Roget 815: cheapness, low price; depreciation; bargain; good penny worth &c.; snap [U.S.].    [Absence of charge] gratuity; free quarters, free seats, free admission, pass, free pass, free warren, give-away, freebee [Coll.]; run of one's teeth; nominal price, peppercorn rent; labor of love.    drug in the market; deadhead^†.    ... show more

A train or bus or taxi traveling empty.