toad

Toad in a hole ; meat baked or boiled in pye-crust.

He or she sits like a toad on a chopping-block ; a saying of any who sits ill on horseback.

As much need of it as a toad of a side-pocket ; said of a person who desires any thing for which he has no real occasion.

As full of money as a toad is of feathers.
toad eater

A poor female relation, and humble companion, or reduced gentlewoman, in a great family, the standing butt, on whom all kinds of practical jokes are played off, and all ill humours vented. This appellation is derived from a mountebank's servant, on whom all experiments used to be made in public by the doctor, his master; among which was the eating of toads, formerly supposed poisonous.

Swallowing toads is here figuratively meant for swallowing or putting up with insults, as disagreeable to a person of feeling as toads to the stomach.

The 1811 Dictionary of the Vulgar Tongue.