When intercourse is happening, and contact is lost, causing the male genitalia to slam into the female.
by din0saur June 2, 2013

When you tell someone something important as a secret and they casually bring it up in conversation without thinking, with the person(s) that should not know in the room with you
If you secretly tell your friends you have a girlfriend and your parents don't know as the uptight bastards may try to keep you from her until they think you are "ready" for that kind of committment.
You and your buddies are sitting around your house just chilling and your mom walks in asking what you are doing tonight and your friends casually make fun of you and asking, "Are you gonna leave us for your GIRLFRIEND?"
You then say, "What are you talking about slip dogg?"
Your mom then says, "Everyone out NOW!" and then you proceed to put your story on FML.com
You and your buddies are sitting around your house just chilling and your mom walks in asking what you are doing tonight and your friends casually make fun of you and asking, "Are you gonna leave us for your GIRLFRIEND?"
You then say, "What are you talking about slip dogg?"
Your mom then says, "Everyone out NOW!" and then you proceed to put your story on FML.com
by Richard from the Gym July 14, 2009

Daniel: I haven't heard you sing.
Sofia: That's good.
Daniel: :D
Daniel: *D:
Daniel: Excuse my Naiduerfian Slip. I do really want to hear you sing.
Sofia: That's good.
Daniel: :D
Daniel: *D:
Daniel: Excuse my Naiduerfian Slip. I do really want to hear you sing.
by AmmaNazi April 5, 2013

21st century slipping of the tongue. Can technically include accidental replies or grammar mistakes...
"ahhh man, I didn't mean to send that! Total slip of the thumb there, apologies!" - In reference to a message sent to someone by mistake, or that accidental !,? or word that likes to randomly make itself a plural....
by Mat Wood September 6, 2017

by chairslip April 9, 2015

by The Super Snake June 4, 2015

Brittany can never watch videos of her own engagement party because she had a total Nip Slip in front of her friends and family and nobody said a word
by Goatsecx luver July 5, 2023
