noun, from Finnish, meaning "
limp", a 'lerppu' is the name for a floppy disk, but it is
usually associated with penises, so a lerppu or lerppu kyrpa would be someone who has a limp penis.
"
Dude, you threw away my homework? You lerppu!"
It can be used to talk about penises, like after a long date, the
man and woman finally get somewhere, and the
man is devoid of an erection; he has a lerppu.