Solderability

I learned (through experience) that aluminum's solderability is very low. It's very hard to solder aluminum.

Akimbo

If a person has his hands on his waist with elbows pointing out, he has his arms akimbo.

Esperanto

If you want to seem smart, learn Esperanto. Or better yet, create your own kick-ass language.

Bicycle Parts

I never knew there were so many bicycle parts. This post on what these bicycle parts are would really make you seem smart.

The Birthday Paradox

In 23 people in a group, there's a 50.7% chance that 2 of them have the same birthday. In 57 people, there's a 99.0% chance that 2 of them share the same birthday.

This sounds like a good party trick. And it's probably worth some money if I wager on it.

HKDNP

Everytime I see a beer can, it has the initials HKDNP on them. It doesn't matter what brand they are but they don't appear on soda cans.

I researched and they stand for Hong Kong Duty Not Paid. I found the meaning on acronymfinder.com but it doesn't specify why it's there or why they're only on beer cans. Nonetheless it's another way to seem smart. Besides, if the people you're talking with are drinking beer, just the meaning of the acronym may suffice for a pretty interesting conversation.

Occam's Razor

Occam's Razor - Entities should not be multiplied beyond necessity

This phrase will stand out during a normal conversation so it's variation should suffice, "The simplest answer is usually the correct answer." But I like Albert Einstein's quote with the same thinking, "Make everything as simple as possible, but not simpler."