burst someone's bubble
To disillusion; to disabuse someone of a false notion or rationalization that has grown comfortable.
I hate to burst his bubble, but he is going to be disappointed if he tries that idea.
verb
To break from internal pressure.
I blew the balloon up too much, and it burst.
To cause to break from internal pressure.
I burst the balloon when I blew it up too much.
To cause to break by any means.
You will not pay for the glasses you have burst?
He burst his lance against the sand below.
To separate (printer paper) at perforation lines.
I printed the report on form-feed paper, then burst the sheets.
To enter or exit hurriedly and unexpectedly.
1913, Mariano Azuela, The Underdogs, translated by E. MunguÍa, Jr. Like hungry dogs who have sniffed their meat, the mob bursts in, trampling down the women who sought to bar the entrance with their bodies.
noun
An act or instance of bursting.
The bursts of the bombs could be heard miles away.
A sudden, often intense, expression, manifestation or display.
I read it in two bursts.
"It's my wedding-day," cried Biddy, in a burst of happiness, "and I am married to Joe!"
A series of shots fired from an automatic firearm.
The explosion of a bomb or missile.
a ground burst; a surface burst
A drinking spree.