The acronym BRAT stands for Bi-drive Recreational All-terrain Transporter.
 

1978 Subaru BRAT #1

Launched in 1977, the Subaru BRAT was designed for the American market and became symbolic of the Subaru brand. The BRAT was developed with the platform and mechanical componentry of a 1977 Subaru station wagon at the rear and the rest of the vehicle built forward from there, fitted with other 1977 Subaru components.

The acronym BRAT stands for Bi-drive Recreational All-terrain...