Diddy‘s ex-girlfriend was back on the stand Tuesday in the 20th day of witness testimony in the music mogul’s federal criminal trial … and she got testy with Diddy’s defense team.

In a tense exchange, “Jane” got short with Diddy’s defense attorney, Teny Geragos, while testifying about her jealousy over a Chanel bag Diddy gave to another woman while they were in a relationship.

Geragos asked Jane if she got a Chanel bag and Jane shot back, “I only got trauma.” Geragos asked Jane about a Bottega Veneta bag and there was a verbal gasp in the courtroom when Jane retorted, “I’m sure you have one.”

Jane also testified under cross-examination about going through with sexual encounters with other men in front of Diddy because it was the only way she could get quality time with Diddy … telling jurors how they would wind down after a sex romp … and saying Diddy’s favorite show was “Dateline.”

Michael Jordan, Shaquille O’Neal and the late Kobe Bryant even got name-dropped … when Jane said she, Diddy and a male entertainer she had sex with were like a “trifecta.” Jane said she was Kobe, Diddy was Jordan and the male escort was Shaq.

Jurors also heard audio messages between Diddy and Jane … including one where he nicknamed her “Crackpipe” … she said because he was addicted to her sex.