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1.
The red, bloodshot face and/or eyeballs caused by violently vomiting.

Chunder strain is caused by the violent muscle spasms bursting the blood vessels under the skin and in the eyeball creating a red, blotchy face similar to that of an allergic reaction.
Guy 1: Jesus, you look like you've been beaten up or on pills!

Guy 2: Nah I just had too much red wine and was sick last night.

Guy 1: That's a bad case of chunder strain!
by Barry Haber April 04, 2010