To do a chuckie is to masturbate in an uncontrolled and public fashion. From Chuckie on Sons of Anarchy who had a chronic masturbation problem..until the chinese mob chopped his fingers off of course.
to fart; to be flatulent; to contribute to the low-atmostpheric supply of methane and, to lesser extents, hydrogen by expelling said gases through one's anus (usually in mixed company)
My grandma used to chuck a brown wheezer every time she got really nervous.