I'm trying to figure out what 血のションベン means. I understand the individual words
and literal meaning. So assuming it doesn't mean "bloods urine", what does
this mean?

Perhaps the full sentance is important in this case: 「私が最初に血のションベンを流した」

If you search for this phrase, just as is with the katakana 「ションベン」 you'll
find numerous hits online. I seem to always see it associated with 「流す」.

Here's another example, which I found online: 「女性にこんなこと言うのもあれなんやけどな、先生らの時代は
血のションベン（小便）だすまで勉強しろてようゆわれたもんやで」
CC BY-SA 3.0
2012-10-03T03:42:21.527
7016
2012-10-03T17:44:44.470
2012-10-03T17:40:34.367
86
86
question
words translation etymology
What does 血のしょんべん mean?
血 means blood. しょんべん means pee. So it should be 血尿 meaning bloody urine. I
cannot think of other meanings.
CC BY-SA 3.0
2012-10-03T04:07:15.020
7018
2012-10-03T04:07:15.020
1720
7016
answer
After reading through pages on Google that use this expression I'm fairly
certain that 血のションベン is used to mean "peeing blood". In context it means
something like, "working so hard that you are peeing blood/your urine is
bloody".
CC BY-SA 3.0
2012-10-03T17:44:44.470
7031
2012-10-03T17:44:44.470
86
7016
answer