Wiktionary
packing on
vb. (present participle of pack on English)
Usage examples of "packing on".
I reckon he, she, or it was after the papers I've been packing on me, personal.
Christ, was this gap narrower than he'd thought or had he been packing on the pounds?
Michael arrived with Dad, found us recumbent and laughing, freaked out, and sent us back to work, sending Michelle packing on the CalTrain.
He sent the hands to breakfast watch by watch and began cautiously packing on, sail by sail.