look up any word, like blumpkin:
 
2.
To be empty or devoid of inventory.
Are you slap out of brains, Bubba, I done told you we're slap out of moon pies?
by harry flashman July 25, 2003
 
1.
Someone who can get knocked out even with a slap.
Eric is such a slapout
by Jenzarato September 14, 2010