Lyric discussion by jayster7 

Cover art for Poison lyrics by Bell Biv Devoe

Every time I listen to this song it sounds like "never trust a big butt and A smile". It also makes logical sense that there is an "a" in there. Yet this site (and every other one I can find online) lists it as "never trust a big butt and smile". Does anyone know if there is a definitive source on this?