Learn English – What does “Keep it real” mean in this context

Something like: dingbat, thingamabob or thingy .

From

1925 E. FRASER & J. GIBBONS Soldier & Sailor Words 215 Oojah (also Ooja-ka-pivi), a substitute expression for anything the name of which a speaker cannot momentarily think of, e.g. ‘Pass me that h-m, h-m, oojah-ka-pivi, will you?’ 1931 J. VAN DRUTEN London Wall II. ii. 73 There's a whole lot in the Oojah Capivvy now. 1962 Sunday Times 4 Feb. 31/6 This was the catch-phrase in a music-hall song in use during the first world war... I remember the line and the tune: ‘You cannot eat it, or see it, or hear it, you just ask for Ujah-ka-piv.’ 1966 ‘L. LANE’ ABZ of Scouse 78 Whur's ther ojah-capiff?, where is the hammer, spanner or whatever it might be? 1992 Hobart Mercury 8 Aug., There are several of Ms Bosanky's turns of phrase that are pure Downunder. For instance, ‘hoojah-kapippy’..or a ‘whatsitsname’ euphemism.

It's Bostonian. The concept comes from the thalidomide babies born with "flippers" for limbs in the late 50s. The idea is that instead of arms or legs it was your head and your brain that were stunted and came out as a flipper. It's a way to say you're a monumental, irretrievable, freakin' idiot.