pack on(v = verb.body) - gain (weight); "He packed on two pounds over the summer"
is one way to gain, put on
Sample sentences: Somebody ----s something

back pack, blister pack, bubble pack, butt pack, disc pack, disk pack, face pack, fanny pack, ice pack, pack, pack animal, pack away, pack horse, pack ice, pack in, pack of cards, pack of troubles, pack off, pack rat, pack riding, pack saddle, pack tent, pack thread, pack together, power pack, six pack, waist pack, wolf pack