1. Pornographic literature
2. A masochist, someone who enjoys being whipped.
1. I was getting horny, so I went online and looked up some fladge.
2. I didn't know he was a fladge until he asked asked me to whip him last night.
Fladge - a woman who has huge flappy vaginal lips. (flappy vadge)
"the woman i slept with last night had a bit of a fladge"
" thats a bit of a fladge you have going on there love"