T-Boz -- The New Year's Song SUCKS ... 'That S**t's Corny'

T-Boz doesn't want to forget old acquaintance ... in fact, she HATES the whole New Year's Eve song "Auld Lang Syne" ... telling TMZ it's the worst piece of crap she's ever heard.

The TLC member went off on the song at LAX today ... claiming she had never even heard it before our guy sang it for her.

But after she went through the lyrics, she really got mad ... explaining that no authentic NYE song would be complete without the lyrics, "F**k 'dem hoes."

True dat.