Top Definition
Following the initial berner (pre boner) and after experiencing climax with a boner, the afterberner is what's left of your penis after sex.
Usually awkward and unwanted the afterberner will leave it's owners with a slightly larger, limp and soft berner.
"Hey Danny tuck that afterberner in man you want your mom to see that?"
"Maybe"
by EmperorSack May 16, 2009

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