a redundant phrase, since each word can mean the same thing. however, due to its rhyming scheme, it seems to be a more definitive way of saying someone or something lost.
beat-you lost the tennis match 6-4, 6-4, 6-3 to a very good opponent.

defeated-you lost your previous match 6-3, 6-2, 6-2 to an average player.

beat and defeated-your kid brother won a match against you 6-0, 6-0, 6-0 even though he had spent the last week sick in bed with the flu and he wasn't wearing his glasses. this, my friends, means you were beat 'n' defeated. soundly.
by earpuller October 21, 2007
Get the beat 'n' defeated mug.