Missed

Ev'ry day she weren't makin' her feelings known was a missed opportunity, plain an' simple.

Abstain

She keeps holdin' out hope he'll break the dry spell; till then, she spends far too much of her wages on batteries.

As Cold as Ice

Only one person'll ever really make Kaylee's sunny disposition freeze over, but even that won't, can't, last long.

STFU

He'll be sweet as can be and it'll go along right and shiny, and then he has to go and open his gorram mouth again.