A slap on the head, usually the back of the head. Not hrd enough to really hurt, but suffient to shake up the recipient more than a little.

Often used in a group of males to "encourage" the one that's always a bit slower than the others.

"So that's three Big Macs, a Quarter pounder, a chicken sandwich .... Jim, what do you want ?"

"Err... a Big - no, one of those fish .... can I have nuggets ? No hang on, something with bacon ....."

<SMACK>

"Make your mind up NOW, unless you want some more brain therapy !"

"Ok, OK, Big Mac and Fries !"
by Eighth of Seven April 9, 2009
Get the brain therapy mug.