When one unintentionally tags along or goes to an event that one may not be wanted at. One feels like the proverbial fifth wheel and like one is intruding and that one is not wanted. A very awkward situation.
Greg: I ended up going out to eat with Sarah's family last night.
Jeff: Really?
Greg: yeah, the problem it that it was a welcome home dinner for her sister.
Jeff: man, you totally gate crashed their cocktail party.
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Sarah: Greg gate crashed my family's cocktail party!
Georgette: bummer.
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Georgette: friends don't let friends go around gate crashing a cocktail party.
Jeff: ...awkward...
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. Penguin Books,1992. p. 38)