"Suck(s) At Life." Used when a person changes your plans, and/or mood
from good to bad, either intentionally or unintentionally. He/She SAL.
My boss walked in at 5:30 on Friday and handed me a project to finish that had been sitting on her desk all day. She definitely SAL.
You texted me to tell me that you can't make it to my going away party because your girlfriend/boyfriend has a headache. You SAL.