Smelly Situation

"Hold it.  Guys?  I thought I was supposed to be loading this thing with gunpowder and rocks.  These things look like little balls of poo. (pause)  Heyyyyy...wait a minute...."

Invisible Dog on a Leash

Quark: "Can you believe it, Odo? They were practically GIVING these poor invisible dogs away at the Bajoran festival!"
Odo: "Quark, I think there's something you should really know...."

Rare?

Picard: "Tasha! You're... you're...."
Tasha: "Hold it, hold it! I know what you're all thinking.  No, I am NOT the limited edition 1701 Series Tasha Yar."

Targ Trouble

"I'd really like it if someone else would clean up all the targ poop just for once!"