You're living in a world that come with plan B
Cause plan A never relay a guarantee
And plan C never could say just what it was
This line refers to how cautious people are in this country. We have a back up plan for our back up plan because we never expect things to work out. Kendrick could also be speaking specifically about this way of thinking in Compton.
Plan A is a condom, which sometime break, hence “never relay a guarentee”. It also refers to a woman’s use of the Plan B pill at times because it is never guaranteed that she will use protection. Plan C is something Kendrick would rather not mention which is having an abortion.
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