To talk with excessive pride
An act of boasting
One given to boasting
Exceptionally good of its kind
Did he brag about specific crimes when you were cellmates?
If I seem to boast more than is becoming, my excuse is that I brag for humanity rather than for myself; and my shortcomings and inconsistencies do not affect the truth of my statement.
Vinnie claimed to be able to show the police where Billie and Willie had been hiding and continued to brag that he had enough information to make headlines and sink half the Philadelphia mobsters.
I know by now, if he wins he comes back early to brag about it, but if he stays out till morning it means he's lost and will come back in a rage.
His presence became known to the authorities and an indiscreet declaration, "Campion Brag," made the position more difficult.