When speaking Hokkien, I use a variety of slang to say
"What's (that)?" :
a. sim mih lai e ?
(甚物來兮?)
b. sim mih waN ko (lai e)
?
(甚物碗糕?)
c. sim mih kut th'au (lai e)
?
(甚物骨頭?)
d. sim mih kui (lai e)
?
(甚物鬼?)
e. sim mih sai ?
(甚物屎?)
f. siaN her
?
(舍貨?)
Do you guys use any of these ?