Tara Reid vs. Jenny McCarthy: Epic Trash Talk Over Boobs and Bad Surg

CROSSING THE LINE

Jenny McCarthy and Tara Reid went off on each other -- live on the air -- when a 'Sharknado' promotion turned into a battle royale over fake boobs and gnarly plastic surgeries.

The showdown happened on Jenny's SiriusXM show Friday, and when she asked Tara if she had to get in shape for her role in 'Sharknado 4' ... things got nasty quickly. You gotta hear it.

Tara tells TMZ she "totally felt so bullied and attacked. It was very unprofessional." She says there's no history of bad blood with Jenny, but feels like "she just wanted to hurt my feelings and say things that would bother me."

Well, that definitely happened. The final dig as Tara walks out is awesome.

And this was no on-air stunt ... Tara says, "She definitely didn't apologize" after the attempted interview.