Glen “Big Baby” Davis is being sued by a woman who claims the ex-NBA star screwed up her business deal with Chris Brown, TMZ Sports has learned.

According to court documents we obtained, the lawsuit was filed on Friday in Los Angeles by a pharmaceutical scientist, Dr. Lyndsey White, who says after she initially got involved in a barbeque sauce venture with Davis — and things went south in a hurry.

Glen “Big Baby” Davis On The Court Launch Gallery

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In her suit, White claims she and Davis agreed in April 2021 to create “Big Baby Q” BBQ sauce … and then, a short time later, she says she gave Davis a $30,000 loan to get into a weed business together as well.

Several months after that, White alleges in her suit Davis helped introduce her to Brown, who then asked White to create a fragrance line for him.

But, when Davis was arrested in October 2021 for defrauding the NBA’s Players’ Health and Benefit Welfare Plan — White says everything changed.

White wrote in her suit Davis turned aggressive — “causing her to fear for her life” — and severed her ties with Brown … resulting in the loss of what she called “a major client.”

Furthermore, White says Davis never paid her back the $30K for the marijuana venture they got into together — alleging the former Boston Celtics forward used the cash on attorneys fees. She also stated Davis went on to sell the BBQ sauce she created for him … never giving her a dime for her role in the biz.

She’s now suing for breach of contract, intentional misrepresentation and more … and is asking for unspecified damages.

Davis — who played in the NBA from 2007 through 2015 — is currently behind bars at FPC Duluth in Minnesota … serving a 40-month prison sentence stemming from his 2021 arrest.