broad in the beam
Adjective
Meaning
(nautical, of a ship) Wide across the hull.
(idiomatic, of a person, especially a female) Wide across the hips, with large buttocks.
Source: en.wiktionary.orgSynonyms
tubby
chubby
overweight
fleshy
rotund
roly-poly
portly
overfed
fattish
paunchy
pot-bellied
overheavy