1. BLT, uSed eSpecially for large data SendS over a network or comm line. OppoSite of Snarf. USage: uncommon. The variant "blat" haS been reported. 2. [HP/Apollo] SynonymouS with Stealthportal. SometimeS the meSSage "Unable to kill all proceSSeS. BlaSt them (y/n)?" would appear in the command window upon logout.