Top Definition
A friendship between two people who have become such good friends that they know everything about each other, absolutely need to talk to each other every day, can communicate with just a glance, and can most often be found together. An inseparable pair.
"Janet and I have a hyperfriendship-- we see each other every day, but still get excited about the prospect of hanging out more."
by mahge January 12, 2010
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