A triumphant knee banger is when you push a girl's head towards your nether regions in hopes of getting a blowie, but you accidentally slam her head against your knee. She then vomits and grosses you out, the toxic waste falls on your crotch, staining your pants with vomit. After a while you realise that it doesn't feel so bad and cum. Hence the name.
Leila: My boyfriend did the triumphant knee banger on me.
Beethoven: Nice.
When a lady gets so old that her breasts sag all the way down to her knees, they then stop being breasts as such and become "knee bangers". Another tell tale sign is when you shout, "Show us your tits!", they must lift their skirt in order to do so.
(Can also be spelt as one word - "kneebangers")
"Those kneebangers make her look like she has four arms!"
"Yeah you're happy know because they're big and firm, just wait until your older... when she turns sharply, you'll get some knee bangers to the face..."
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)