deadhead

Don't expect him to understand this complex concept, he's such a deadhead.

His suggestions at the meeting were so boring and foolish; he really is a deadhead.

That deadhead actually spilled coffee on the computer.

To encourage new blooms, I must regularly deadhead the faded flowers.

The gardener advises that to keep the garden tidy, it is necessary to deadhead the wilted flowers often.

She spends some time each day to deadhead the faded flowers on her roses.