Using rhyming word pairs to create synonyms of other descriptive pairs is often used as brain teasers for children. For example, an overweight referee is also a plump ump.
plump ump
plump ump
fat rat
Fat rat is probably the phrase you are looking for. A rat is a rodent, and fat means overweight.
Rhyming word pair for home for a rodent?
Rhyming word pair for Friend who does not arrive on time?
Rhyming word pair for happy boy?
Rhyming word pair for bashful man?
Rhyming word pair for snowflake cut from paper?
Fake snake is the rhyming word pair for plastic serpent.
Smitten kitten is the rhyming word pair for young feline in love.
"Holy kitty" is a rhyming word pair for "godly cat."
"Hazy lid" is a rhyming word pair for "crazy kid".