einstein

noun4

1. •
   (informal) A genius; a very smart person.

   • He's a prodigy — they call him their little einstein.
2. •
   (informal) An idiot; a very stupid person.

   • Yeah, that guy is a real einstein — he always finds a way to mess up the simplest order.
3. •
   A shape that can be repeated to cover a plane with a nonrepeating pattern.
4. •
   (old-fashioned) One mole of photons, regardless of frequency, as used to measure irradiance.

   • The einstein (symbol E) is an obsolete unit with two conflicting definitions.

noun1

1. •
   a person who is very clever or quick to understand things

   • Can you believe he's just a kindergartener? It looks like they've got an Einstein in the family.
   • Good job, Einstein, thinking you could grab the wires with your pliers.