A phrase used to back the conversation up when you realize you weren't listening. You caught the ice cream end of the conversation,and oops, you wish you had heard the meat and potatoes. It could be important, so you use this phrase to try and sneak by the fact that you were thinking about dirty pics and bacon cheeseburgers while your friend was pouring their heart out. Hopefully they're so distraught they'll rewind and repeat without noticing.
"........And he left me there all drunk with no shoes and my weave falling out!"
Mantra of the Attention Deficit Disordered. Literally: stop talking and start over. Needs a good full 1 second pause between words. "wait (one thousand one) what?" and it's vital that eye contact is not made.
" so were both going to have to go in both cars so we can leave one for Will at his work so he won't have to get a ride home."
... ... "wait...what?"