Because I'm a pain in the.....

[Unit 5302]

I guess the usage of brand names as the actual product only gets to me every once and a while. Some times it's just easier to use the brand name rather than the technical term.

Kleenex vs Tissue
Formica vs Laminate
NOS vs N20
Rollerblades vs In line skates (this one is really ackward)

In the south, one that really does annoy me is the use of "Coke" to refer to all brands of pop (or soda if you're not from the midwest), as in what kind of coke would you like.

You just have to take it with a grain of salt though, people who don't know better usually look at you like you're nuts if you try to explain it anyway.