dead-head (dead-heads plural & 3rd person present) (dead-heading present participle) (dead-headed past tense & past participle ), deadhead
1 verb To dead-head a plant which is flowering means to remove all the dead flowers from it.
(BRIT)
Dead-head roses as the blooms fade. V n
2 n-count If you say that someone is a deadhead, you mean that they are stupid or slow.
(AM)
INFORMAL