Top definition
To speak the truth on a situation. Or when you agree with something that someone else says.
Billi is short for Billion
Also known as “that’s a fact!”

For example, Guy says “ that girl over there got the fatty,” and if she does, you would reply with “that’s a billi!”
by Swish Chink February 10, 2019
Get the mug
Get a That’s a Billi mug for your guy Nathalie.
Jan 25 Word of the Day
Oh youre just being alive? I’m horny too
via giphy
by ecogoth January 01, 2021
Get the merch
Get the just being alive neck gaiter and mug.