UBD
= U =
UCE
UBE // n.
[abbrev., Unsolicited Bulk Email] A
widespread, more formal term for email spam. Compare
UCE. The UBE term recognizes that spam is uttered by nonprofit
and advocacy groups whose motives are not commercial.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.