Eat like a horse and Peck at

Peck at and eat like a horse are semantically related. In some cases you can use "Peck at" instead a verb phrase "Eat like a horse".

Peck at verb - To subject (someone) to constant scoldings and sharp reminders.

Eat like a horse and peck at are semantically related. Sometimes you can use "Eat like a horse" instead a verb "Peck at".