This is a heavy one. It's the act of ending one's life by hanging. In a less literal, more modern 'hugot' sense, it's what you feel like doing when your thesis adviser rejects your draft for the fifth time. 'Mag-bigti na lang ako' is a common, though dark and hyperbolic, expression of extreme frustration or despair. (Note: This is a serious topic. If you or someone you know is struggling, please seek help.)