Meaning of shuō bu dìng:
shuō bu dìng
说不定
Adverb
can't say for sure; maybe
Tā jīntiān shuō bu dìng huì lái.
他今天说不定会来。
He might come today, but we can't say for sure.
Wǒmen míngtiān shuō bu dìng huì qù hǎitān.
我们明天说不定会去海滩。
We might go to the beach tomorrow.