Columbo is in fact when you seem unintelligent but you actually are very smart. Your wife (even if you dont have one) is always talked about eventhough you never get to see her.
Lt. in LAPD. Easily the best "detective" America has to offer. Characterized by:
1: A beat-up raincoat.
2: An aging Peugot.
3: A cigar (the cheap kind).
4: Follows a suspect around, irritating them until they slip up.
5: No apparent first name (actually, he does have one: Lt.)
6: A never-seen wife.
To call someone "Columbo" or "a Columbo" can either be taken as a compliment or a threat.
Used to describe a final/minor step or issue in a computer/software repair that becomes in itself a major issue.
A 'columbo' is named for a the TV show detetective by the same name who was known for his phrase at the supposed end of his questions/investigation "oh yeah, one more thing" - and USUALLY that 'one more thing' is the 'kicker' as it were.
When a male pretends that he has blown his load (can be by spitting on partners back if in doggie style) then when said partner thinks sex acts are complete, the male says... "One more thing" and blows his load over his partner.