Green’s Dictionary of Slang

(US black teen) bad, fake, inferior, second-rate.

1997–2001		Online Sl. Dict. 🌐 bootsey adj 1. inappropriate. (‘That was very bootsey of you man.’).
2002		Teen Lingo: The Source for Youth Ministry 🌐 bootie [...] bootsie adj./adv. Something undesirable. An inopportune or unfair situation, event, or thing. ‘Man, that teacher is bootsie’ ‘Did you see his pants? Bootsie!’.
2005		A. Swartz ‘Sweet, Tight and Hella Stupid’ in S.F. University High School Update Mar.–Apr. 2: bootsy – smelly.