Mack truck

Etymology
Named after the Mack brothers who founded the company in 1900.

Noun

 * 1) A motor vehicle produced by, especially a semi-trailer.
 * 2) A semi-trailer of any brand.
 * 3)  Any unstoppable or enormous thing coming through.
 * 1)  Any unstoppable or enormous thing coming through.
 * 1)  Any unstoppable or enormous thing coming through.

Usage notes

 * This term and may have trademark status.