not very intelligent
не очень умный (ne ochen' umnyj)
"He’s kind but not the sharpest tool in the shed."
"Он добрый, но не самый умный." (On dobryj, no **ne samyj umnyj**.)
to do something very important that will be remembered
the real value of something can only be judged when it's put...
to summarize something briefly
to have many creative ideas at once
to try any method to succeed, even if unlikely
to have control or advantage over someone