English · Slang Candidate 18+

drain the main vein

Proposed by a contributor, not yet supported by evidence.

Meaning · English

To urinate.

⚠ Register: slang, vulgar

Where it’s used: Used American English

I got to drain the main vein, kiddo, so you just stay put.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Common questions

What does “drain the main vein” mean?

To urinate.

Is “drain the main vein” formal or informal?

drain the main vein is generally slang, vulgar.

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