definition of
buggy

[1] #1 buggy n. [roadster] a small lightweight carriage; drawn by a single horse. wn

[2] #2 buggy s. [balmy, barmy, bats, batty, bonkers, cracked, crackers, daft, dotty, fruity, haywire, kooky, kookie, loco, loony, loopy, nuts, nutty, round the bend, around the bend, wacky, whacky] informal or slang terms for mentally irregular; "it used to drive my husband balmy". wn

[3] #3 buggy s. infested with bugs. wn