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2.
A malformed infant.
I'm sorry ma'am, you've just delivered a bobus.
by Johnny Chingas January 13, 2004
 
1.
Bombed Out Back Up Singer, as in the less attractive, less talented, less overall kick-ass member of a group, similar to grenade
the other girls from Destiny's Child, not Beyonce

"Did you see Christine and her friends at the party? She was looking hot, but they were bobus"
by sweatband danny January 31, 2005