My common ones when referring to items:
Ford, GM, WTF, POS, POJ, Trash, Chinese made sh*t, mickey mouse sh*t
When I'm really pissed off at the designer/ engineer:
"whoever designed this needs to apologize to the closest tree for wasting the oxygen the tree worked so hard to produce"
"mom of whoever designed this should've swallowed it"
"whoever designed this obviously doesn't talk to the engineers who make this, and whoever made this obviously doesn't talk to the designer of this"
When referring to left and right:
Driver side, passenger side
When someone goes to the wrong side:
"Dude, we're not in Japan. Go to the other driver/ passenger side"