To burst someone's bubble is to reveal something to them that they were unaware or ignorant of, often in the form of bad news. However, it doesn't necessarily have to be something negative (see example 2).
Example 1: Sorry to burst your bubble, but your "perfect" girlfriend is cheating on you with Dave.

Example 2: Sorry to burst your bubble, but pearls are not formed from compressed coal. You're thinking of diamonds.
by Ark-7 May 31, 2012
Get the Burst your bubble mug.
When someone is feeling all happy and opptimistic, you take your asshole self and totally break his happyness, therefore bursting his bubble. Eventually, you will become known for bursting people's bubbles, and they will hate you with a burning passion.
Guy: Don't worry dude, she's hanging out with her friends. She's still faithful to me.
Other Guy: Uh, I hate to burst your bubble Editor's note: No he doesn't., but there she is drinking with that guy.
Guy:... Fuck you man.
by Cecil Love August 1, 2006
Get the Burst your bubble mug.
Fart in the bathtub and bite the bubbles. Congratulations, you've just physically bitten a fart.
"I hate to burst your bubble, so bite your own Goddamn fart!!"
by Lowrider June 3, 2003
Get the Burst your bubble mug.
When someone pokes there finger into you, usually your stomach. Some idiots will say "Burst you bubble"
"Hey Calvin"
"Burst your bubble!" *While poking*
"*laugh* Stop that!"
by Flower_Me_Pink January 12, 2008
Get the Burst your bubble mug.
to get realistic on someone ass, to tell somebody a cold truth, regardless of what he'll think about you afterwards
I'm sorry to burst your bubble but Santa isn't real.

If you're a 34 year old man living with your parents then you are a looser, yeah, sorry to burst your bubble here.
by Mrbacknotblack December 11, 2013
Get the to burst your bubble mug.