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1.
Someone who you are semi-friends with/ used to be friends with, but is now annoying. You keep up the appearance of friendship but don't really like hanging out with them.

similar to frenemy

*a friennoyance can also be someone who you are, in theory, friends with but, for whatever reason, do not want to be seen with.
person 1: "i'm stuck sitting next to Samantha in science"
person 2: "but I thought you were friends with Samatha."
person 1: "she's more of a friennoyance.."
by cloakee September 29, 2010