1 in 1 out 

Whatever information that had been told to you, enters your mind and "exits", causing you to forget immediately/after sometime. Often used with ears.

Teacher: Tom, what is the solution to this problem?
Tom: Don't know.
Teacher: Are you even paying attention in class for the past 5 minutes?
Tom: Yes but its 1 in 1 out right now.
Teacher: What do you mean?
Tom: Whatever you said, enters through 1 of my ears and exits throughout the other.

1 in 1 out by joel91 September 5, 2010

1 tap in out fast 

When your dick is way to big and you fuck a pregent lady and you can feel the baby inside and cum on the baby

"bro i 1 tap in out fast this chick"

1 tap in out fast by manly_the.dude January 21, 2021

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