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8 year oldIggy Azalea has a big 'ol message to Nick Young and the woman he knocked up -- EFF YOU BOTH!!
Iggy fired off the one finger salute -- which she clarified was directed at Nick and Keonna Green -- while at an airport in Australia on Wednesday ... hours after Keonna spilled her guts to US Weekly about her secret affair with the NBA star.
Iggy also claims Keonna's a liar -- saying Keonna is simply not telling the truth about an alleged attempt to contact Iggy to clue her in on the adultery.
Keonna -- who's 22 weeks preggo with Nick's child -- said she was hooking up with Nick since September ... 3 months after he proposed to Iggy.
Yeah, we kinda get why Iggy's pissed ...