brain bubbles 

1. A mental situation that occurs when one has to fight their natural urges, such as lust, leading to feelings of dismay.

2. Brain Bubbles also occur when someone attempts to mentally stave off the effects of drugs they have taken, such as LSD.

G: "Man, I totally want to bone Vanessa but she's off limits because she used to date my brother"
M: "Don't fight it dude; you'll get brain bubbles!"

brain bubbles by GLaz January 27, 2014

bubble brain 

A person with a brain as empty as a bubble. Both girls and guys can be bubble brains, but it often refers to a girl. A bubble brain may not remember what you say minutes after you have spoken. If she is thinking at all she is thinking about herself.

To be only slightly smarter than Paris Hilton. A bubble brain may still be a good time in bed and scream from pleasure really loudly. She is a bubble brain but her body is hot.

bubble brain by Roberta Capelovitch June 16, 2007