Q. Kathleen Hanna, the lead singer of the group Bikini Kill, gave Cobain the idea for the title when she spray painted “Kurt Smells Like Teen Spirit” on his bedroom wall after a night of drinking and spraying graffiti around the Seattle area. In his pre-Courtney Love days, Cobain went out with Bikini Kill lead singer Tobi Vail, but she dumped him. Vail wore Teen Spirit deodorant, and Hanna was implying that Cobain was marked with her scent.
Cobain didn’t know it when he wrote the song, but Teen Spirit is a brand of deodorant marketed to young girls. Kurt thought Hanna was complimenting him on his rebellious spirit, as someone who could inspire youth. Sales of Teen Spirit deodorant shot up when this became a hit, even though it is never mentioned in the lyrics.