The writer 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 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". 
