Lexical Definition

‎שַׁיִן‎ shayin (shah'-yin) urine H:N-M
from an unused root meaning to urinate

piss.

1) urine

Brown-Driver-Briggs

[‎שַׁ֫יִן‎, ‎שֵׁין‎] noun [masculine] urine; — plural suffix ‎שֵׁינֵיהֶם‎ 2Kgs 18:27 = Isa 36:12 (both Kt; Qr ‎מֵימֵי רַגְלֵיהֶם‎).

Brown-Driver-Briggs References

Book Refs
2 Kings 18:27
Isaiah 36:12