(lahyfpeyn) - noun: A term to quantify the amount of anguish and torment present in your life. Usually expressed on a scale of 1-10, although other scales can be used. Sometimes also referred as a being's lifepain index.
- "How you doing today man?" "My lifepain is high, FML!"
- "Ugh, on a scale of 1-10 my lifepain is an 11 today."