Someone with an irrational love of, or fetish for, weaponry (especially firearms). From the Greek "hoplon" meaning armaments, and "philia" meaning love or intense friendship.
Watch out for that weird guy with the NRA Sticker on his 4x4, he looks like he might be a hoplophile!
A person who enjoys collecting and using firearms.
Burt Gummer from the 'Tremors' franchise is a hoplophile.