B.C. 

The condition of severe crankiness that accompanies waking up and not having a hot cup of coffee in the morning, and someone talking to you before the caffiene hits your bloodstream.

Secretary: "Good morning Mrs. Lincoln, hope you had a nice weekend. Just an FYI. You have a 9 am meeting, I made 12 copies of the morning agenda, there's a phone call from Harper Publishing on line 2, and I have to call your clients about the latest ad campaign, can...I.."
Mrs. Lincoln: *indecipherable grumbling and expletives here as she slams the office door in her secretary's face*
Secretary: oooh she's definitely feeling B.C. this morning. *said to the rest of the office staff as she makes a pot of industrial strength coffee for her boss*

B.C. by Ninjanerd90 February 27, 2017

B.C. 

Bad Crime
Refers to a Crime happening in 1979. No one really knows what happened. "B.C." has been seen in grafitti all over the United States.

Last night my grandpa told me a story of B.C.

B.C. by BKA June 9, 2005

B.C. 

Amelia: Why were you at that party?!??

Jayden: It was B.C.

Amelia: What’s B.C.?

Jayden: Before Covid.

Amelia: Ahhh. Ok. Got you.

#BC #B.C. #beforecovid #BeforeCovid

B.C. by Brothaontheinside July 26, 2020

B.C. 

Before covid

I went to concerts every weekend B.C.

B.C. by Jar Singh September 4, 2020

b.c. 

when someone's gay

thats b.c.

b.c. by iwannago2thebeach December 9, 2023

B.C. 

it is just for a year

B.C. just means before christ.

B.C. by nicku1006 July 19, 2025

b/c 

A word commonly used by teenagers while in Instant Messages or chat rooms. Short for "because".

I like cheese b/c it is yellow.

b/c by Anonymous November 1, 2003