Wasted is a slang term with multiple meanings depending on context:
1. Extremely drunk or high on drugs (e.g. "Dude got totally wasted last night")
2. Killed or defeated (e.g. "The enemy got wasted in that battle")
3. Wasted time or opportunity (e.g. "What a wasted day")
4. In gaming culture, refers to being killed (e.g. "You got wasted by that noob")
5. In hip-hop culture, means being extremely high or intoxicated