When someone is watching television at such a loud volume that they cannot hear people talking to them. Originates from the loud annoying THX sound heard at the beginning of movies.
She can't hear you man, she's THXing.
1. To take something; to accept an object.
2. To fuck something (to give it).
(Can be used interchangeably with any verb)
Just chech, chech it like I cheched it.