Green’s Dictionary of Slang

(US) that’s mine! I want to do that! I want a share! a child’s term used to claim the whole or an equal part of an object; the negative response to the cry is no aikies, no shares.

1934		H. Roth Call It Sleep (1964) 364: And with a ‘No akey! No akey!’ flung over their shoulders, the two partners raced toward Avenue D.
1956		AS XXXI 37: Then there is the negative form, in which [...] the claimant fends off all other claims down to the smallest: fen dibs, fen shackles, no dibs, no aikies, no chips, no divvies, and [...] no halveens.
1968, 1970		in DARE.