Hate shag Share definition Flag Someone you really hate but would like to have sex with anyways. Aly- I would so hate shag John!!!!Jess- You would?Aly-yeah he's so sexy but I still hate him! Hate shag by ALEXLECAR November 1, 2010 0 0 Get merch Get the Hate shag mug. Buy Now — $32.95 See more merch