A person who parades their sexuality around like it's a prize or feels as if they have to mention it every five seconds in any conversation they ever have, just like many vegans, who feel the need to enlighten everyone of their diet choices.
Person 1: By the way, I'm gay if I haven't already mentioned it. *5 seconds pass* Did you know I'm gay?
Person 2: Yes, I heard you. *leans to Person 3 and whispers* Man they're such a vegan gay.
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Person 1: *looks at Person 2's Instagram with a pride flag profile picture, Gay in their bio, and every post has a rainbow somewhere on it* Man this person is such a vegan gay.
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. PenguinBooks,1992. p. 38)