backfailed

When you can't pull out fast enough to put your load of semen on a girls back.

When Kirkland couldn't pull out fast enough, he quickly backfailed inside of Bri.

by SantaClausHaha May 23, 2010

backfail

1. When a backfire results in an epic fail. Like when trying to say "backfire" and saying "backfail" instead.
2. Describes the result of aging to a persons back.

Wow dude, your joke about the Swedish dwarves totally backfailed. Now no one will go to your birthday party.

by khao niaow mumuang August 29, 2011