DMX Lashes Back at Fredro Starr -- 'He's 4 ft. Tall & ALL TALK'

DMX is returning fire in his war with Onyx rapper Fredro Starr -- telling TMZ, he ain't one bit afraid of the guy's death threats ... claiming, Starr's "a midget" who "can't even reach my knee."

X tells us, "I am not worried about him ... All he is is a sitcom Moesha gangsta. He should just stick to being a reality gangsta cause that's about all he's good for." (FYI, Starr appeared on the show "Moesha" back in the 90s.)

In case you don't know, DMX is responding to a video Starr posted on YouTube, in which Starr freestyles, "This n***a X talking sh*t right now, If he ever try it again/He be in front of the firing pen/If his crew front, there be a lot of dying men/At the funeral, family and crying friends."

Starr laid down the death threat rap after DMX went on a radio show last week, and claimed Starr once got an ass-whupping by one of X's baby mamas. (Skip to 11:20 in the video.)