Yeah, that was pretty sad even for freestyles. In the name of a member of a poetry forum I work at... it was made by 'Five Monkeys with a Typewriter'. Let's break this down to its raw components.

look at all you niggaz yall just runnin ur lips
keep talkin ur shit son and u B feelin hallow tips
my glock likes to talk alot so Ill let him slip
It'd be better to write them out...unless you're trying to make it fit by taking away letters. No, just no. That's like the most unoriginal shit ever. We can only hope your "glock" slips when you're cleaning it. Most likely sucking the barrel with your mouth.

cus bitches my name says it all layin u out wit a 12 gauge
im commin back to Rv to let yall know im outta my cage
im like a hitman when u need some 1 to be killed give me a page
I'll give you a page and a pencil so you can work on your skills.

._. No hate. Just elevate.