Shannon Sharpe is vowing to sue his rape accuser for defamation ... in wake of the allegations she made against him in a bombshell lawsuit she filed on Sunday.
The ESPN personality addressed Jane Doe's explosive claims in a video that he posted to his Instagram page on Tuesday morning ... just minutes after the woman's attorney, Tony Buzbee, released an audio file to TMZ Sports that he says shows Sharpe threatening his client with "disturbing, aggressive, and dangerous" language.
Sharpe opened up his statement by claiming Doe's case "is a shakedown.