1675-85; < English Romany: brother, mate, dissimilated variant of continental Romanyphral ≪ Sanskritbhrātṛbrother
a special air service offered by the U.S. Postal Service for sending parcels from 5 to 30 pounds (2.3 to 13.5 kg) to overseas servicemen: only the regular parcel post rate to the U.S. port of shipment plus $1 is charged.
1788, from Romany (English Gypsy) pal "brother, comrade," variant of continental Romany pral, plal, phral, probably from Sanskrit bhrata "brother" (see brother (n.)). Extended colloquial form palsy-walsy attested from 1930.