(informal) scatterbrain

(informal) absent-minded, scatterbrained

(informal, figuratively) to waste one's breath (to speak without being listened to) / (informal, figuratively) to blow smoke; to talk through one's hat (to speak about issues one doesn't understand)

(informal) (with a) poker face (without revealing one's thoughts or intentions)

Describes an apparent lack of merit of special attention or remark

(colloquial, dated) burglar

in the spirit of the times, in the spirit of the age, in keeping with the times; in fashion

(figuratively, informal) horizontal dancing, a roll in the hay

(informal, figuratively) flat on one's back

border police