Definition of "swashbuckler"
A swordsman or fencer who engages in showy or extravagant swordplay.
Quotations
Phillips, in his New World of Words defines, to swash, to make fly about; to clash, or make a noise with swords; and a swash-buckler, a vain glorious sword player or fencer, a meer braggadochoe, a vapouring fellow.
1786, Francis Grose, A Treatise on Ancient Armour and Weapons, page 80