No
Not a phrase I can say I'm familiar with either.
(SnowyTheWereRabbit the Leporid from Hell, Fri 23 Jul 2010, 23:13, 1 reply)

Nope....
me neither.....

Edit: Google gives me nothing, urban dictionary gives me nothing, wikipedia gives me nothing, I don't care enough to look any more!
( user_names_suck, Fri 23 Jul 2010, 23:55, closed)

Hmmm...
...I think this is some vague and rather tenuous reference to the fact that Mexican vets sell Nembutal to anyone who wants it, ostensibly for use in euthanising animals, but in reality used for human suicide.
(emadex thinks the world will end on, Sat 24 Jul 2010, 4:50, closed)

It's not the Mexican Suicide...
The whole thing makes no fucking sense. There are sentences with no apparent subject. Quotes with no apparent object, from unspecified people.
Vague and tenuous?
( blyerkit e k trilby, Tue 27 Jul 2010, 10:36, closed)

It's in the Profanisaurus.
I think it was implying that Mexicans are too lazy to commit suicide and as such die in their sleep.
( Colonel Boris "...a desperate Buzzfeed imitation...", Sat 24 Jul 2010, 10:44, closed)