Brooke Hogan -- I Hated the Undertaker ... Feared He'd Steal My Panties

Hulk Hogan's daughter says she couldn't stand The Undertaker while she was growing up ... claiming she was in constant fear that the wrestling legend was gunning to steal her underwear.

Brooke explained her panty paranoia at the The Pool After Dark at Harrah’s in Atlantic City ... saying that she thought he got his name "Undertaker" because he would "take underwear."

Hogan says she was later convinced the guy was NOT a panty pilferer.

But get this ... on the flip side, Hogan says her FAVORITE wrestler growing up was "Macho Man" Randy Savage ... and she tells a pretty adorable story about the WWE legend.

Was Savage really a teddy bear in private?? OOOOOH YYYYEEEAAAHHHH.