自便

自便	zì biàn	to do as one pleases; to not inconvenience oneself
自	zì	(bound form) self; oneself / from; since / naturally; as a matter of course
便	biàn	plain / informal / suitable / convenient / opportune / to urinate or defecate / equivalent to 就: then / in that case / even if / soon afterwards
便	pián	used in 便宜 / used in 便便 / used in 便嬛