Lyric discussion by 000/ 

Cover art for Baby lyrics by Suburban Lawns

I would say "Popular sin is just on cringe" is the actual line. That kind of makes sense given the previous reference to "devil's food" but there's so much word play going on here (phonetically even) it's hard so say.

@EmmaJones No, it's "popular cig is really just on cringe". I own the CD reissue of their debut album that came with a lyric sheet.