This phrase connotes to, “on my mother” . Other examples include. “On me”
“On the mob” “I put that on my life” or what children used in the 2000s that was over exertingly corny “on my cousins grave” . A form of expression of being serious.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.