ABS

(automotive) Initialism of antilock braking system.

(organic chemistry) Initialism of acrylonitrile butadiene styrene.

(plumbing, informal, humorous) Initialism of all-black stuff: i.e. acrylonitrile butadiene styrene, referring to the black color of the waste water

plumbing pipes composed of this plastic.

Initialism of automatic block signaling.

Initialism of auto-brewery syndrome.