Butty is The Word of the Day (Because this should be semi-educational)

Butty is an excellent word.  Once you know what this word means, you'll use it all the time.  TRUST ME!  It's fun.

Butty is a noun.  It can mean one of two things:
1.  A slice of bread and butter.
2.  A sandwich.

Example: I really like a lot of mayo slathered on my butty!

Using this word can generate some odd looks from bystanders.  Just roll your eyes at them and know that their vocabulary is obviously not as sophisticated as yours.