Green’s Dictionary of Slang

mama-huncher n.

also mother-huncher

euph. for motherfucker n.

[US](con. WWII) J.O. Killens And Then We Heard The Thunder (1964) 68: This bad-feet jitterbugging mother-huncher was outdancing everybody. [Ibid.] 195: You fat-ass mother-huncher.
posting at Ron Androla Homepage 🌐 OK, let’s get some poetry on dis mamahuncher! And if there’s any left over, shoot it my way — and send the fucking monkey while you’re at it.
[US]Jim Chandler ‘Deathdream Duo’ Ch. i 🌐 I feel like a stoned mamahuncher! Texas Bill said, high as he was on shitfilm fumes and stagnant nitro wafting up from the nether droppings.