The basic street smart definition is being aware of your surroundings and making wise decisions based on your senses in urban environments.
Using an ATM under any circumstance in any location comes with heightened situational risk as you’re effectively a walking mark.
An overt but nonviolent public passer-by pickpocketing or luggage robbery tactic using spilled drinks as highly effective acts of misdirection.
Deceivingly appeasing a mugger’s demand can counteract that hostile action without loss of actual valuables while maintaining safety.
“I heard from an associate of yours that some thugs tried (unsuccessfully) to rob you in Cairo. Can you share some insight into what happened?”