I'd say Kurupt's entire verse from Dr. Dre's "Xxplosive" was fucking horrible, specifically these parts:
"Fuck a bitch, don't tease, bitch, striptease, bitch
Eat a bowl of these, bitch, gobble a dick"
"Captain Save 'Em All Day, bitch, well, save this dick
Bitch-nigga, you more of a bitch than a bitch"
Seriously, it's dumb to use "bitch" that many times in one verse, especially making it rhyme with itself. Too $hort doesn't even do that.