The barracks is a building where unmarried military personnel live, it is mosty inhabited by men. A barracks bunny is a female military personnel who lives in the barracks and has random casual sex with many men in the barracks.
CPL Jones: " man, i havent gotten a piece in a good minute...ima hit up "so and so" the barrack bunny, shes a sure thing"
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)