on one's toes

active bright careful intelligent observant perceptive sharp vigilant wary watchful wired wise

hip jazzed quick ready spirited

all ears cagey circumspect clever fast on the draw good hands heads up heedful on guard on the ball on the job on the lookout on the qui vive psyched-up switched on wide-awake with it

careless dull foolish ignorant inattentive incautious indifferent indiscreet lazy negligent stupid thoughtless unaware unintelligent unobservant

slow uneducated

asleep drowsy lethargic sluggish weary

aware conscientious interested observant vigilant watchful

heedful

alert all ears awake enrapt enthralled fascinated glued hanging on every word hooked immersed intent listening mindful on the ball on the job on the lookout on the qui vive preoccupied regardful studious

careless inattentive negligent unaware

disregarding heedless ignorant inconsiderate neglectful neglecting unattentive

apprehensive careful cautious cognizant conscious conversant knowledgeable observant respectful solicitous vigilant wary watchful

alert alive to au courant be up on cagey chary conscientious heedful in the know know all the answers know ins and outs knowing observative observing on the ball on the job on to plugged in regardful sensible thoughtful tuned-in with eyes peeled

careless heedless ignorant inattentive incautious indifferent indiscreet negligent quiet rash thoughtless unafraid unaware uncareful uninformed unmindful unobservant unworried

absent-minded

attentive discerning discriminating intelligent mindful perceptive vigilant

advertent alive bright clear-sighted comprehending considering contemplating correct deducing detecting discovering eager eagle-eyed heedful intentive interested keen not missing a trick obedient observative on the ball penetrating questioning quick regardful searching sensitive sharp sharp-eyed surveying understanding wide-awake

careless heedless inattentive neglectful negligent unaware undiscriminating

indifferent thoughtless unmindful unobservant unwatchful

alert careful cautious defensive guarded heedful mindful observant on guard on the lookout on the watch upon one's guard vigilant watchful

active all ears attentive bright cagey careful clever good hands heads up intelligent lively observant on guard on the job on the lookout on the stick perceptive quick ready sharp spirited vigilant watchful wise with it

active all ears bright cagey careful circumspect clever fast on the draw good hands heads up heedful hip intelligent jazzed observant on guard on the ball on the job on the lookout on the qui vive perceptive psyched-up quick ready sharp spirited switched on vigilant wakeful wary watchful wide-awake wired wise with it

attentive careful cautious observant suspicious vigilant wary

alert

all ears chary circumspect glued guarded heedful hooked keen not missing a trick on guard on the ball on the job on the qui vive on the watch open-eyed prepared ready see after see to unsleeping wakeful wide-awake with eyes peeled

careless heedless inattentive incautious indiscreet rash thoughtless uncareful unobservant

negligent

active alert all ears attentive bright bright-eyed and bushy-tailed fast on the draw heads up intelligent lively on guard on the ball on the job on the lookout psyched-up quick ready sharp spirited vigilant watchful wide-eyed wired

alert careful cautious defensive guarded heedful mindful observant on one's guard on the lookout on the watch vigilant wary watchful

alert alive attentive awake on the job on top of ready sharp vital wide-awake with it