Green’s Dictionary of Slang

horny n.4

[horny adj.]

(US) one who is sexually excited, desirous of sex.

[US]‘Troy Conway’ Cunning Linguist (1973) 73: Even in Budapest, the quota of hot kids, avidly eager young hornies, is as staggeringly evident as it is in a pool room or back yard out in Bumpus Mills, Kentucky.
[US]N. Thornburg Cutter and Bone (2001) 113: Them Tekes, though — what buncha hornies they were, huh?