遠慮の塊
Meanings
1
the last piece left on a shared plate (out of politeness)
Osaka dialect expression for the final morsel of food that everyone hesitates to take, often used humorously to break the awkwardness.
"This last piece of fried chicken is the 'enryo no katamari.' Somebody please eat it."
At the end of the party, just one 'enryo no katamari' was left on the plate.