Floppy dick syndrome is an occurance where by a man who has a rather large penise wears athletic jogging pants or shorts but does not wear supportive under garments which causes his penis and testicles to becom free and floppy as he walks. Causing the appearance of a floppy dicke
This is a sexual act, where the male participant enters the female vagina, just like sex, except the male can't get hard. Sometimes beacuse the male has had too much sexual activity within a short period of time, or just because he's an impatent Runt.
When a guy with a small dick uses a method to increase the size of his dick, but it gets less and less hard as it increases in size - mostly because it's unnatural.
Bill: that black dude's dick is so huge!
Tom: yeah but that girl sucked his dick for 15 minutes and he still had to squeeze the base to get it in her... it's a flat out loose floppy dick.