Strange strings that cannot be inserted into a table

I'm collecting some random tweets.  For some of the tweets, I failed to insert their body into a MySQL database.  Following is the error message I received.

Incorrect string value: '\xF0\x9F\x91\xAF\xF0\x9F...' for column 'tweetBody' at row 1

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Here is the tweet body.

Tell Tyga look for this chick called black china sill a nigga bitch ???? In a hot flash ?? menopause hot flash

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I believe it's because of the squares.  The collation of the database is utf8 - default collation.

Thanks.