Green’s Dictionary of Slang

stop teasing! stop exaggerating!

[1917		R. Lardner ‘Carmen’ in Gullible’s Travels 22: Get offen that stuff! I and Carmen’s just like two pavin’ bricks].
1957		H. Simmons Corner Boy 148: Get off it, cat.
1967		L. Bruce Essential Lenny Bruce 270: You don’t say, ‘Shithead, get off it!’.
1972		B. Rodgers Queens’ Vernacular 95: get off the weed (dated, imp, late ’50s) a command to stop daydreaming [...] Syn: Get off it!
1992		R.C. Cruz Straight Outta Compton 54: ‘I bet if I fucked her I could make her scream,’ Rooster said [...] ‘Get off it!’ Clive shouted. ‘I am sick and tired of talking about her.’.