Green’s Dictionary of Slang

1. (US) frightened, jumpy; frightening [booger v.¹ (1)].

1905		Baxter Spring News (KS) 23 Mar. 1/4: [song title] ‘Boogery Things’ — Helen Waggoner.
1941		Amer. N&Q I 86: The use (non-obscene) of this word [= bugger] in colloquial American speech seems clear, but some details remain to be worked out. Into this category would go: the non-obscene buggery [...] with its original sense of ‘Devilish!’ or even merely ‘Spritely!’.
1952		W.D. Overholser Fabulous Gunman 56: If you hadn’t been so boogery you couldn’t think straight, you’d know I wasn’t after you.
1967		B.K. Green Horse Tradin’ (1999) 4: He [i.e. a horse] was hard to saddle, hard to mount, and because he was so snorty, snaky, and boogery, he was hard to ride.
1969		in DARE 335/2: Boogery-eyed.

2. unpleasant, malicious [booger n.² (2)].

1993

S. King Dolores Claiborne 167: That was a boogery thing you done, firin that girl like that.