Add this to your .bash_profile to handle history properly across multiple terminals, and output exit code of last command plus suitable fortune in appropriate color.

gistfile1.sh

declare -r red=$'\e[31;40m'
declare -r blue=$'\e[0;34m'
declare -r d=$'\e[37;40m' # set this to what makes sense for your terminal color scheme

shopt -s histappend

pre_prompt() {                       
  local exit_code=$?;                
  history -a;                        
  history -n;                        
  if [ ${exit_code} -eq 0 ]; then    
    local msg="OK"   
    echo "${blue}?=${exit_code} | ${msg}${d}"; 
  else                               
    # -o means offensive. Not for the faint of heart or those that pair or screenshare a lot!
    local msg=$(fortune -o -s -n 140)
    echo "${red}?=${exit_code} | ${msg}${d}";  
  fi;                                
}

export PROMPT_COMMAND=pre_prompt
export HISTCONTROL=ignoredups:ignorespace