The singer of Because I Got High sums up that as a result of his constant reliance on cannabis, he lost custody of his children, lost his wife, and ended up homeless and "sleeping on the sidewalk" and admits that he is singing the whole thing wrong, because he is high.
The song explains how the narrator has forgotten to clean his room, failed his college class (which he plans to take next semester), sold kush (after losing his job), missed court dates, had his paycheck garnished due to missed child support payments, gambled away his car payment, becomes a paraplegic as the result of a police chase, and is left by his wife for neglecting to have sex with her. The singer then sums up that as a result of his constant reliance on cannabis, he lost custody of his children, lost his wife, and ended up homeless and "sleeping on the sidewalk". He ultimately decides to end the song, and admits that he is "singing the whole thing wrong, because [he is] high". 
