They say pressure bust pipes
And I ain't never had to deal with plumbing in my life, now that's a bar

from Ab-Soul (Ft. Kendrick Lamar) – Rapper Shit Lyrics on Rap Genius

Meaning

When pipes are under pressure, they literally will burst. Kendrick is saying he is unfamiliar with plumbing and pipes, so don’t expect pressure to effect him. A bar is a two lines coming together, so Kendrick is basically patting himself on the back

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