He means 15 lines
Your rhymes are "unheard" of like a deaf-mute talking to himself/
Only elevation you've done...is while leveling your shelf/
I shit on your HEALTH, and you need a "stainless"-steel-fist/
Cuz fisting-yourself is the only way you could hand me some "shit"/
Your punches "HIT" like little kids playing Murder Inc...(not hard at all)/
Call me "cold-water" the way im makin ya' chances shrink.../
You give me a WINK and ill rip your eyes ata ya skull and shove them down ya throat so you can "watch" me kick-your-ass/
Pull my foot out and give your "brass-back"(steelfist), I'll light you on fire so you can really claimed you've rolled in the "grass"!/
Here's part of my PAST, let me show you the silver-lining/
Fucking your girl is the only way I could afford "fine-dining"/
Like a FLYING navy, your style "bites" so much that it has rabies/
I wear the Nicotine patch-so-that YOU avoid cravings.../

13th line, here's your unlucky one...

Let's be sensibal, your fuckin wit funda-mentalz........./
Only time you "re-load lead" is on your mechanical pencil!/
Retrace that^^like it was a STENCIL and you were playing with spyrograph../
Poor kid~ fightin with chinese-people only time he holds part of a "staff" (never had a job)

Weak finish but itll be enough to beat you, ive seen what u can do...
spit man...