Green’s Dictionary of Slang

manavalins n.

also malhavelins, manablins, manavilins
[ety. unknown, but note contemp. naut. jargon manarvel, to pilfer small stores]

odds and ends, bits and pieces, typically of food or small change.

Mercier & Gallop Life in Man-of-War 169: De way dey overhaul a range of every pan, dish, and kettle, to find de manavalins, is nobody’s business.
[US](con. 1843) Melville White-Jacket (1990) 133: Hence the various sea-rolls, made dishes, and Mediterranean pies, well known by man-of-war’s-men—Scouse, Lob-Scouse, Soft-Tack, Soft-Tommy, Skillagalee, Burgoo, Dough-Boys, Lob-Dominion, Dog’s-Body, and lastly, and least known, Dunderfunk; all of which come under the general denomination of Manavalins.
[UK]Hotten Sl. Dict. 176: MANABLINS, broken victuals.
F.K. Robinson Gloss. Words Whitby n.p.: Malhavelins, [...] small perquisites or dues.
[Aus]Bulletin (Sydney) 30 Oct. 3/4: Spriggins [...] collared a spoon — and with that spoon deliberately tasted the tripe, the lobster salad, a custard, a jelly, and a few other ef ceteras —and then pocketing some unconsidered ‘menavolins’ in the shape of bon bons, nuts, kisses, crackers, raisins and other sweets — sauntered back to the ball-room .
[US]G. Davis Recoll. Sea-Wanderer 289: There are other terms in common use in the cabin and cook's galley [...] Bread crumbs and other broken victuals from the cabin table are manavelins.
[Aus]‘Rolf Boldrewood’ Robbery Under Arms (1922) 164: He’d a stool and a table too [...] No end of manavalins either.
[Aus]Truth (Sydney) 3 Mar. 1/6: And now, with new manavellings, / With sausage and snavellings.
[UK]R. Clements [title] Manavilins A Muster of Sea-songs, as Distinguished from Shanties, Written [...] 1890–1910.