The full version of the official Jack Serious theme song is here! Listen to Jack Serious rap "You Don't Know Jack", with lyrics below!

Intro

If you dont know serious you don't know jack

If you dont know serious you don't know jack

If you dont know serious you don't know jack

If you dont know serious you don't know jack

Verse 1

If you're jackin' around, in your own town

Then expect Jack to take you down

He's serious, 'cause he don't mess around

And he smells trouble like a bloodhound

Leather jacket and glasses, secret agent man

Rollin' with the punches 'cause he's never got a plan

Hot on patrol, he's on the attack

if you don't know serious, you don't know Jack

Chorus

If you dont know serious you don't know jack

If you dont know serious you don't know jack

If you dont know serious you don't know jack

If you dont know serious you don't know jack

Verse 2

High profile, doesn't keep it on the low

He's got mad skills, and fists to throw

Fights for justice, lays the smack down

He's the toughest undercover agent around

Drives a car from the 90's, throws on his shades

All for minimum wage low pay

He's got a knuckle sandwich, here's your snack

There's no comin' back, if you don't know Jack