I was drivin' one night down I-35 I looked in the mirror at the fog filled night I saw a big chrome grill fillin' up my back gla** It was a semi-truck and she was on my a** I saw big shiny bulldog on her fibergla** snout And I knew it was the truck they all talked about Tearin' up the highway at breakneck speed Dodging every scale and every DOT Chorus: Doin' ninety miles an hour with a trailer on the back, She's a little bit Peter; she's a little bit Mack Spittin' out smoke just as black as coal, That's another hundred miles and a gallon of oil She's hell on wheels and a real road hog, Get outta the way of the big, bad dog She lost the driver's side door back in 89, Had a fibergla** hood, just sanded and primed Thirteen gears, 4 more in the back The frame said Peterbilt, the cab said Mack She had a queen size sleeper with satin sheets The driver never did pull her over to sleep Haulin' through rain, mud, snow and sleet Draggin' everything from steel to Kansas wheat Repeat Chorus Bridge: Drop a load in Wichita Crushed cars to Arkansas Hot Sauce down to Louisiana Dead head back to Texarkana Next load goes to San Antone Man she just keeps chuggin' on Hunkered down and makin' racket, If you can stack it, she can drag it Yeah, yeah So if you ever take a trip down I-35 Look in the mirror at the fog filled night See a big chrome grill fillin' up the back gla** It's the big, bad dog better move your a**! Chorus: Doin' ninety miles an hour with a flatbed on the back, She's a little bit Peter; she's a little bit Mack Spittin' out smoke just as black as coal, That's another hundred miles and a gallon of oil Doin' ninety miles an hour with a reefer on the back, She's a little bit Peter; she's a little bit Mack Spittin' out smoke just as black as coal, That's another hundred miles and a gallon of oil She's hell on wheels and a real road hog, Get outta the way of the big, bad dog Boys she's hell on wheels and a real road hog, Get outta the way of the big, bad dog