light-headed

['lait'hedid]

1. weak and likely to lose consciousness;: "suddenly felt faint from the pain"; "was sick and faint from hunger"; "felt light in the head"; "a swooning fit"; "light-headed with wine"; "light-headed from lack of sleep"

2. lacking seriousness; given to frivolity;: "a dizzy blonde"; "light-headed teenagers"; "silly giggles"