Green’s Dictionary of Slang

bugged up adj.1

[bug n.1 (1) + ? ref. to bug n.4 (2a)]

(US) dressed up; thus bug up v., to dress up.

[US]O. Wister ‘Texas Vocab.’ in Wister Owen Wister Out West (1958) 159: Bugged up dressed up.
[US]O. Wister Lin McLean 3: ‘Bugged up to kill!’ exclaimed one, perceiving Lin’s careful dress.
[US]G. Milburn ‘The Dealer Gets It All’ in Hobo’s Hornbook 149: I’ve bugged-up, bo, and mush-faked – done time in old L.A.