1.) One that must express him or her self through another.
2.) One that cannot keep love private and must overly show to everyone else that its something special when it just makes everyone else sick.
3.) A Papichulo (try hard pimp, unsuccessfully) is commonly referred to as a weak soul because the weak heart within that does not trust and cannot control a situation by flooding love.
You see that guy on the face? Hes got a weaksoul
.. you can see how he has no life in himself.. and has to use that girl next to him