[交流] Funny English quiz in everyday（NO.1）

Today’s Question
What walks around all day and lies under the bed at night with its tongue hanging out?

We will hold this column everyday from today, the one who write the right answer first can earned 1 BB.
If u missed it this time, please come on and come here early, then use your smart head to find the answer.
I will give u the right answer in the column tomorrow.
So good luck to u!