eating with one's hands
Literally 'five chopsticks', referring to the five fingers used when eating with hands instead of chopsticks. A playful or metaphorical expression.
I forgot chopsticks on the camping trip, so I had no choice but to eat with my hands.
From 五本 (five long, thin objects) + 箸 (chopsticks), humorously likening the five fingers to five chopsticks.