heads up

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 heedful on guard on one's toes 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

active all ears attentive bright cagey careful clever good hands intelligent lively observant on guard on one's toes 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 heedful hip intelligent jazzed observant on guard on one's toes 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

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

admonition advice alarm alert caution example guidance hint indication information lesson notification prediction recommendation sign signal suggestion threat word

Mayday SOS augury caveat exhortation fore foretoken forewarning injunction intimation omen portent premonition presage tip tip-off token wink

distress signal handwriting on the wall look out watch-it word to the wise

misinformation

be alert be careful be on guard beware check out have a care hearken keep an eye out keep tabs listen mind notice pay attention peg pick up on scope shotgun size up spot spy watch out

disregard ignore neglect