一个头两个大

yī ge tóu liǎng ge dà

(coll.) to feel as though one's head could explode (Tw)

one

ge

used in 自個兒|自个儿[zi4 ge3 r5]

tóu

head

liǎng

two

ge

used in 自個兒|自个儿[zi4 ge3 r5]

big; large; great