A medical condition in which whenever the affected person is so overcome with laughter, it renders them unable to perform various motor tasks using their hands. Such as writing or typing.
1) Person A: *tells a joke*
Person B: HAHAHAHHAHA omg I have laughy hands now and can't write!
2) "Sorry it took me so long to text you back, something funny happened and I had to wait until my laughy hands subsided."