deep think (noun) inspiration: idea, stimulus
Sinonime: active,
alert, all ears,
attentive, bright, bright-eyed and bushy-tailed, bright-eyed and bushy-tailed, fast on the draw, heads up, intelligent,
lively, on guard, on one's toes, on one's toes, on the ball, on the ball, on the job, on the lookout, psyched up, quick, ready, sharp, spirited, vigilant, watchful, wide-eyed, wired