Top Definition
1.A phrase of exclamation derived from "shit mate!"
2. showing sympathy towards a companion after hearing bad news also derived from "shit mate"
3. A word used to check that your friend is ok, normally when your friend is sick due to alcohol intake.
1. A: i did that lass the other night.
B: Shm8!

2.A: my nans dead.
B:awwh, shm8.

3. A: Shm8?
B: shm8.
by aronsamandtony August 19, 2007

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