完食 かんしょく
kanshoku

Noun
Suru Verb

1. eating everything (on one's plate, etc.)

Transitive
つまみ いと うか、完食 かんしょくしていたように えたが。
tsumamiguito iuka kan shokushite ita yōni mietaga.
You say you had a nibble, it looked to me like you'd polished it off.