devil-may-care
Adj
#words

happy-go-lucky
Adj
#words

freewheeling
Adj
#words
Inf

(As) ......
#idiom

As dull as ditchwater (or dishwater)
#idiom

As clear as mud
#idiom
"The computer manual was as clear as mud, so we stopped reading it."

As long as your arm
#idiom
Inf

As light as a feather
#idiom

As large as life
#idiom

As flat as a pancake
#idiom

As easy as pie/ABC/anything/falling off a log
#idiom
Inf

As clear as day
#idiom

As clear as a bell
#idiom

As blind as a bat
#idiom

As....as hell
#idiom
Inf

As deaf as a post
#idiom
Inf

As dead as a doornail
#idiom

Nimble

Exacerbate