Adjective phrase meaning that your assumed position is slightly larger than the actual position you belong in, hence the idiom referring to the too big for the pair of pants.
When you smarted off to the boss yesterday, everyone in the office thought you were too big for your britches.
Taking a righteous shit in your pants and leaving it there all day to keep warm in the winter or on cold summer nights. Also, this aroma will drive the women wild!
Example 1: "Man, last night I laid down the rawest doodoo britches and I couldn't keep those fine huns off my junk!"
Example: What am I getting for Christmas? Her answer was "Cat's fur for kitten's britches." meaning none of your business. Grandmom was born in 1905 so it goes back at least that far.