Torba is a slang term, specifically referring to hashish or weed. It's not a standard German word for these substances, making it quite unique and indicative of a specific subculture.
In the context of the song, the line "Aus dem Block, aus dem sie kommt, da riecht es mies nach Torba" (From the block she comes from, it smells badly of Torba) paints a vivid picture of the environment the character inhabits, suggesting a connection to drug culture and a gritty urban setting. This word choice adds a layer of authenticity and rawness to the lyrics.
OMAR's "Rose Im Block" introduces us to a fascinating and maybe a little dangerous character. The song describes a woman who's drawn to the wild side, wanting "Cali pur im Pape" [pure Cali in the paper] and even standing "auf Dealer, Bruder, sie steht auf Gewalt" [on dealers, brother, she stands on violence].
She's a bit of a mystery, with "Augen von 'nem Jinn" [eyes of a Jinn], and the singer warns us to "pass auf, sie wird dich testen" [watch out, she will test you]. Despite her tough exterior and coming from a block that "riecht es mies nach Torba" [smells bad of hashish], she's also described as a "Rose im Block, auf Asphalt wächst sie am besten" [rose in the block, on asphalt she grows best], suggesting a beautiful resilience in a harsh environment. The singer even admits, "Ich glaub', sie ist 'ne Toxische" [I think she is toxic], but there's a clear attraction to her unpredictable nature.