The definition of the word "Disappointment" means running into a wall with a boner and breaking your nose.
Definition of Disappointment
Categories
Explanation
Experiment
Explain Bear
Listen up, buttercup. This "joke" is saying disappointment is when you're all excited (ya know, boner-style) and then BAM! Reality hits you harder than mama bear's paw, leaving you with a broken nose. I bet you've never ran into a wall but plenty of other walls you've hit, ain't ya?