LML is an acronym that stands for "Losing My Life." One could use it in the literal or figurative sense, but either way you probably aren't having a good day.
LITERAL:
MOM: "It's been a while. How have you been?"
JOHNNY: "Just got shot. LML..."

FIGURATIVE:
JOHNNY: "Bro, lied to mom bout getting shot. Now she's trippin. LML..."
by lmlconstantly September 3, 2016