Cory Booker Fasted, Skipped Water to Avoid Bathroom During Record Senate Speech

8:14 AM PT -- A rep for Cory Booker confirms to TMZ he did not wear a diaper during his record-setting Senate speech ... meaning he gabbed for over 24 hours without going to the bathroom.

Cory Booker went full marathon mode this week, breaking the record for the longest Senate speech -- and he’s dishing on all the tricks he used to pull it off ... including how he avoided a single nature break.

At a press conference after his epic speech, the New Jersey Senator spilled the secret to his endurance -- he had fasted for days and cut out water beforehand, which definitely helped him dodge any mid-lecture bathroom breaks.

Cory gave more insight into how standing strong for 25 hours and 5 minutes in total came at a cost -- explaining that skipping water gave him some brutal muscle cramps along the way.

But he powered through, pulling out every trick in the book to push past those cramps -- all in the name of railing against the shake-ups and chaos brought on by Trump's second presidency.

Booker was also asked if he used a diaper or another device to help him push through ... check out his response -- 'cause he seems to be skirting around the question here.

On a more serious note, Cory told reporters that folks were calling on Democrats like himself to step up and take risks to make their voices heard -- so standing and speaking for hours on end felt like the right move for him.