Every GIF you could possibly need to use between now and October 31st.
When you're trying to figure out what to dress up as this year:
Source: spammijane
When you get a facebook invite to a cool party:
Source: lllaaauuurreeennn
When you're trying to justify your Halloween costume to everyone:
Source: noyoureoutoforder
When your friends are dragging you to some lame party you don't want to go to:
Source: lotsofugh