The Return of LIght Joker's definitions

dead air

a sudden and undesirable silence (from the term for the interruption of radio or television broadcasts)

The dead air coming from the bathroom was sign that something dire had happened.

by The Return of Light Joker October 8, 2011

face for radio

an ugly face (because a radio presenter is never seen by the audience)

The latest bus driver has a face for radio.

by The Return of Light Joker October 9, 2011