Lyric discussion by Lostscroll 

Cover art for Sappy lyrics by Nirvana

It is a direct criticism of the rules imposed by the philosophy of various religions. The first verse addresses salvation and there is a reference to death (cover you in grass). The lyrics address several metaphors for the limitation of individual freedom, accepted by the individual to please a deity. The reference to the laundry is the metaphor for the "brainwashing" through which this philosophy is propagated

Negative
Subjective
Anger
Criticism
Religion
Freedom