A big wad in your head that controls all your functinons and gives you the ability to remember stuff. Get your mind outta the gutters sickos.

The faithful dog belonging to Inspector Gadget and his niece Penny. Brain is Penny’s sidekick, and helps her on missions. Brain has human level intelligence, and can do things that normal dogs cannot, such as ride bikes and use tools. Brain has saved Inspector Gadget countless times. He loves his human comrades, especially Penny. Brain will do anything to protect his humans, and usually endures astounding amounts of punishment. All he wants in return is the company of Penny, and food.

to give a deep throat blow job they say its so deep it hits the brain

oral sex:head, blow job

A game in which if someone says something stupid, another person yells "brains" and slaps the person who said the stupid thing on the back of the hand

oral sex

a slang term coined from the fact that head = brain.