From The Collaborative International Dictionary of English v.0.48 [gcide]:
Roofy \Roof`y\, a.
Having roofs. [R.] --Dryden.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
roofy
n 1: street names for flunitrazepan [syn: R-2, {Mexican
valium}, rophy, rope, roofy, roach, {forget me
drug}, circle]