A phrase said to acknowledge or point out a deafening silence.
In the 1980's film called Ferris Bueller's Day Off, a
teenager called Ferris Bueller bunks off
school. The teacher reads out the roll call to monitor attendance. Since the
lad is away, when the teacher reads out 'Bueller', instead of hearing the response 'Here' - we hear a blast of deafening silence. The teacher repeatedly says, "Bueller" which is followed by
pure silence, again and again.
This highly repetitive section of a film, which us 80's kids watched repeatedly, then became the catchphrase that it has become today.