Someone who knows you better than yourself. Someone who you usually get into trouble with. Someone who has your back no matter what. Someone who can tell your secrets and everything to. Someone who loves you even with all your flaws. Someone who won't change who you are. Sometimes your partner in crime can also be someone who you're in relationship with, or a person you have feelings for, or just a friend.
by Nopickles November 19, 2019
A best friend, a confidant, a secret lover. Someone who knows you better than you know yourself. Someone who has your back no matter what. Someone who knows what you are thinking before you do. Someone who won't change you and loves you for who you are. Someone you feel connected to and comfortable with makes you feel appreciated and loved. Someone who knows it’s ok to send that selfie, sext or nude. Someone who you love to message and messages you but never deletes an unread message.
My partner in crime just gave me the best birthday BJ
by Piclover69 May 9, 2021
A companion or friend that partakes in slightly illegal activities. Such activities shall not be named for legal reasons. Once you become partners in crime you are bonded for life.
Person 1: Did you hear
Person2: what?
Person 1: Rayne is my new partner in crime.
by Lucinda is Lit January 23, 2021
1. A partner in crime is someone you trust with secrets and get in trouble with together, usually one person

2. Partners in crime are two people who spend most of their time with each other, usually causing Michief
1. That was so fun putting sticky notes all over Mr. Janton's desk! You are my partner in crime!
2. Did you hear the rumors that Lucy and Claire said about Karen? The are always spreading rumors. They are like partners in crime.
by Pugacorn December 27, 2016
good friends who get in trouble together or get each other in trouble and laugh about it.
we always get in trouble together. you're my partner in crime!
by molz pocket June 9, 2007
This person is your bsf. She/He is always there for you and y’all play around and prank ppl.
That my Partner in Crime
by Um WHERE?! December 11, 2018
your significant other; someone you can depend on to help you get shit done! Your Boo
Whew, I'm glad we finally finished that project! Gimme five my "partner in crime"! Crime meaning a good thing philosophically speaking.
by Shelly Rae May 8, 2007