Swag is usually when someone walks with 'swagger' with a lightbounce in their step. This is a new term used by mostly teens nowadays and often referred to as #swag or #yolo
(There are many different spellings for this word.)
Word used to describe the combination of the holidays Christmas, Hannukah, and Quanzaa, either referring to as a whole or to the holiday season in general, so as not to be biased. Or just 'cause it sounds cool.