When your mistress legs become so weak that she can barely walk. The friction of getting a lot of dick gives one noodle legs.
Candy got 9.6 last night and it gave her spagoodle legs.
When a woman rides on a huge johnson and it makes her have so many multiple orgasms that they have spaghetti legs and noodle legs at the same time.
I rode that monster so long it gave me spagoodle legs.