to enjoy something completely.

She has the kind of cheery voice that adults might dislike but little kids just eat it up.

Related vocabulary: lap up something

Etymology: based on the literal meaning of eat something up (= to finish the food you have)

• someone's bark is worse than bite
• someone's bark is worse than their bite
• someone's beauty sleep
• someone's best bet
• someone's better half
• someone's blood boils
• someone's blood is up
• someone's blood runs cold
• someone's bottom drawer
• someone's bottom line
• someone's bread and butter
• someone's butt is on the line
• someone's claim to fame
• someone's days are numbered
• someone's ears are flapping
• someone's eyes are bigger than belly
• someone's eyes are bigger than stomach
• someone's eyes are bigger than their belly
• someone's eyes are bigger than their stomach
• someone's eyes are out on stalks
• someone's face doesn't fit
• someone's face is a picture
• someone's glory days
• in store for someone
• in store for something