吃饱了饭撑的

chī bǎo le fàn chēng de

having nothing better to do

see 吃飽撐著|吃饱撑着

chī

variant of 吃[chi1]

bǎo

to eat till full

le

(completed action marker)

fàn

cooked rice

chēng

to support

de

of; ~'s (possessive particle)