* As fat as a pig: This is a classic simile, comparing someone to a large, plump pig.
* As fat as a butterball: This simile emphasizes the roundness and softness of the person being compared.
* As fat as a whale: This is a simile used to describe someone who is extremely overweight.
* As fat as a house: This simile is used to describe someone who is very large, both in height and width.
* As fat as a pumpkin: This simile is used to describe someone who is round and plump, similar to the shape of a pumpkin.
The specific comparison used will depend on the context and the desired effect.