epsilon

1. A small quantity.

2. Something that can be safely overlooked.

3. Something very small.

1. These french fries need epsilon more salt.

2. Ignore the tax, it is just an epsilon.

3. What a cute little epsilon!

hit the rails

1. To go to an extreme, esp. to become extremely agitated.

She really hit the rails when when I told her the truth!

no-op

(pronounced 'no op', from NOP the computer assembly language instruction that tells the computer to do nothing)

Loser; a stupid or lazy person.

He's a complete no-op. Ignore him.