deadhead

Short definition from Wiktionary

Noun

1. 1
   A person either admitted to a theatrical or musical performance without charge, or paid to attend.
2. 2
   An employee of a transport company, especially a pilot or flight attendant, traveling as a passenger for logistical reasons, for example to return home or travel to the next assignment.
3. 3
   Anyone traveling for free.
4. 4
   A train or truck moved between cities with no passengers or freight, in order to make it available for service.
5. 5
   A person staying at a lodging, such as a hotel or boarding house, without paying rent; freeloader.
6. 6
   A stupid or boring person; dullard.
7. 7
   A tree or tree branch fixed in the bottom of a river or other navigable body of water, partially submerged or rising nearly the surface, by which boats are sometimes pierced and sunk; snag.
8. 8
   Driftwood.
9. 9
   Alternative form of Deadhead (“fan of the rock band The Grateful Dead”).
10. 10
    A zombie.
11. 11
    A fan of the rock band Grateful Dead.

Verb

1. 1
   To admit to a performance without charge.
2. 2
   To travel as a deadhead, or non-paying passenger.
3. 3
   To drive an empty vehicle.
4. 4
   To send (a person or message) for free.
5. 5
   (transitive) To remove spent or dead blossoms from a plant.