没什么 (pinyin: méi shén me, written "mei shen me" or "meishenme") means it doesn't matter; it's nothing; never mind. Below: its meaning, pronunciation, stroke order, and example sentences, so you can learn how to read, say, and write 没什么.
Meaning
it doesn't matter; it's nothing; never mind
think nothing of it; it's my pleasure; you're welcome