noun: someone foolish, easily surprised, or naïve. Used in a slightly derogatory or playful manner. Related to ones expression resembling the open-mouthed O-shape of a guppy fish.
noun: a climbing hold, refers to the way the climber's hand is turned sideways and grips a hold by cupping it with the little-finger side of the hand.
noun: (obsolete) A high earning gay person living in a major urban area, especially a male
noun: Alternative form of guppy [A tiny freshwater fish, Poecilia reticulata, popular in home aquariums, that usually has a plain body and black or dark blue tail for the females and a more colorful tail for the males.]