TRB
TRB may refer to:

Funnelbeaker culture (Trichterbecherkultur in German), a megalithic culture
Tap, rack, bang, a firearm technique
Terminating Reliable Broadcast, in distributed computing
Tom Robinson Band, a British rock band
Transportation Research Board, a U.S. advisory board
TRB (writer), a ghostwriter name used in The New Republic magazine
trb., a musical abbreviation for trombone
Trump Rebate Banking system, a scam targeted at fans of Donald Trump