A learning experience where the fail that takes place in an attempt to achieve an objective is at a scale large enough to prevent another attempt of the said task even though the new information in hindsight would have ensured the success of the original task.
Jason: "Did you hear that Matt went bankrupt 3 months after starting that new business?"
Vin: "Yeah, started the whole thing on credit cards and didn't make the sales he expected, that was a learning wall for him"
A figurative wall which the person has to smash head first through in order to learn something difficult. Used when a learning curve cannot be steep enough. esp. when the person doesn't know what they are in for.
Mike: "I heard that stupes Jonny wanted to take the Bar Exam"
Steve: "Yeah, he's blates gonna have to smash through the Learning Wall head first"