Possibly the best pairing ever to have spawned from the Harry Potter series, 'Drarry' is the pormanteau name for a relationship between the characters Harry Potter and Draco Malfoy.
Drarry shippers believe that Drarry started when Draco asked Harry to be his friend back in first year, but Harry declined, much to Draco's dismay, in the Philosopher's Stone. Some others believe that Drarry started in sixth year in the Half-Blood Prince when Harry intentionally used Sectumsepra on Draco Malfoy, resulting in Harry eventually feeling bad for Draco. Most shippers love the scene where Draco and Harry share a broom to get away from the Fiendfyre, caused by Vincent Crabbe, in the Deathly Hallows.
You can find most Drarry shippers on Tumblr and Fanfiction sites.