Lupe Fiasco and Kid Cudi blow up at each other around 2015, with fades offered.

Their issues run deep.  A few years back, Cudi apologized to everyone he's wronged in his life except for Cudi.

“F*ck Cudi, forever,” Lupe said at the time. “That n*gga will never get an apology from me ... I will never apologize with Cudi, that sh*t was so gay."

This week, Cudi is in the news for beefing with his former buddy Kanye West over his other buddy Pete Davidson.

Under that backdrop, Lupe responded to a Tweet in which somebody referred to Cudi as a GOAT.

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"Oh he a goat. But he a b*tch," Lupe shot back.

Is that a fair assessment?