When someone (usually a man), who is usually straight but has a moment when they act totally gay. Examples include grinding with no chicks around, any Justin Bieber impression, or other gay movements, statements, or voices.
Bob: "Ya and he decided to try out his Justin Beiber voice at the party"
Jill: "OMG! Thats another Random Act of Gayness!"
Jill: "OMG! Thats another Random Act of Gayness!"
by KCRoyals15 November 16, 2010