Bolt on 

The act of simply bolting on a part. No fabrication required. A procedure that offers ease of installation.

Snow Whites engine consist of readily available bolton parts.

Bolt on by David Lott July 19, 2005

bolt on 

part that can be easily added to a car.

He just put in a bolt on blower.

bolt on by John December 6, 2004

Bolt on 

To in stall performance parts that increase horse power.

Yo I just installed a bolt on nitrous kit 100 shot. But my bottles are empty. #stocktoday

Bolt on by CornHub77 June 8, 2019

bolt-on 

Breast implants/female with breast implants

"Whoa! That's some serious bolt-ons!" or "She's an obvious bolt-on."

bolt-on by Crapper McGee January 23, 2004

Bolt-on 

Aftermarket parts that can be simply bolted on a vehicle without any fabrication to upgrade a factory equiped part. Vehicle has to come from the factory with like part.

Factory longblock must remain intact with unmoddified parts it came with from the factory.

These are Bolt-on's:
Intake, exhaust, pullies, throttle body, larger supercharger or turbo on factory equiped vehicles.

TVS GT500 - Yes
Twin Turbo Z06 - No
Camro with heads/cam - No
Nitrous - No

Bolt-on by SomeYoungGuy December 18, 2012

bolt-on 

A group of girl lezbos that all use the same bolt on penis. They bolt it on each other and use it. This group of girls are normally guy as hell and have no boobs.

The bolt-ons are doing it again.

bolt-on by CinderellaMan1717 October 24, 2011

BOLT-ON TITS 

fake boobs, implants, silcone tatas.

"she had a wonderful set on bolt-on tits"

BOLT-ON TITS by paulie g krueger March 24, 2008