1. a fan of
Jerry Garcia,
The Grateful Dead
2. a river snag of tree &/or log &/or large
flotsam
3. a useless person on staff
4. verb & noun) a toll vehicle(taxi, bus, train, truck(lorry/semi) travelling empty (noun: such trip)
Rick, that deadhead(3) in the mailroom is a deadhead(1)
John had a deadhead(4) trip after dropping off a load of lumber -- while
deadheading(4) back he saw a major deadhead(2) in the river stuck in
a boat's props, so he
phoned the coast guard!