1. An idiot who won't recognize he has not yet understood your side of the argument.
2. Somebody who is very arrogant and stupid, yet he will not ask for further explanation out of pride.
3. A douchebag that has a hard time understanding things. From the conjunction if the words "Shmuck" and "Slo-Mo" (as in Slow Motion) because he is arrogant and slow (from the understanding approach).
"If you didn't understand any of the previous definitions and pretend to understand not to be embarrased by asking, beware, you might be a Shlomo"
- "And I kept trying to explain to him that every time he blocks my driveway I am late for work, but he wouldn't understand"
- "What a Shlomo"