I'm still a bit confused on what Attack Damage Carry means.
Someone mind dumbing it down for me?
An AD Carry (known as Marksman by Riot) is a champion that primarily outputs damage through ranged auto attacks (which scale off attack damage).
By building a mix of attack damage, attack speed, critical strike chance, and lifesteal they are usually one of the two highest damaging members of a team (the other being the AP Carry). They often lack the use of many defensive items, however, so they're decently easy to kill if caught alone by multiple enemies.
The main difference between them and an AP Carry aside from using different stats to deal damage is that AD Carries generally output consistent high damage, while AP Carries are sudden bursts of very high damage, limited by cooldowns.
Not that I did say Ranged. All AD Carries (Also known as marksmen) are ranged champions. Someone like master yi, despite scaling off of attack damage and being considered a carry (high damage, low durability), he's not an ADC because he's melee.