Top Definition
1505 is one of the seven residential halls on the Illinois Math and Science Academy campus. This hall is often referred to 05. This hall is commonly stereotyped as being full of jocks and totally BA. The central location of this hall on campus has caused it to become the zenith of residential life at IMSA. The presence of the 05 slabs in front of this hall also add to the social dominance of this hall.
Eric: Was that kid cool?
Sarah: He lived in 1505.
Eric: Oh, wow, he must have been bamf!
by 05er 4 life March 28, 2009

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