An idiom meaning "having large breasts."
To say someone is jugged up is to say they are stacked, buxom, busty, bosomy, chesty, juggy, well-endowed, tittylicious,
top-
heavy, big titted, or otherwise has big jiggling funbags.
Antonyms:
flat-chested, little-titted, owner of mosquito bites, needs a training bra, member of the itty-bitty titty committee