You need to stop doing that, like teasing someone (something done with scissors)
Cut it out
Heavy rainfall (canines and felines)
Raining cats and dogs
Reverse a decision because of fear (egg laying farm animal and a preposition)
Chicken out
Go to bed (dried grass of burlap container)
Hit the hay/sack
Something that sounds untrue or not believable
Sounds fishy
Have Fun (have a spherical object used in games)
Have a ball
Something very easy (dessert)
Piece of cake
in trouble (canine dwelling)
in the doghouse
Nervous about doing something
(colorful flying insect + digestive organ)
Butterflies in my stomach
Sick or ill (beneath snow, rain, wind, etc)
Under the weather
Tried to do more than was possible (use your teeth)
Bit off more than he could chew
Tell a secret; reveal information (release a feline from a paper container)
Let the cat out of the bag
Sad or depressed (feeling a sky color)
Feeling Blue
Show no facial expression (hold onto a face that is not crooked)
Keep a straight face
Voice is cracking (amphibian + swallowing tube)
Frog in my throat
Keep a secret or don't tell anyone (maintain something below your headwear)
Keep it under your hat
Generous, sincere, kind (blood pumping organ + a precious metal)
Heart of Gold
Hurry or move quicker (wiggle a lower appendage)
Shake a leg
Avoid talking about something(hit around the shrub)
Beat around the bush
Say something embarrassing or stupid (place her foot into her oral opening)
Put her foot in her mouth
About to be said; almost remembered (on the point of your taste sensing organ)
On the tip of my tongue
Lose your temper (hit the upper part of a room)
Hit the ceiling
Concentrate or think hard (put on your brain's function headwear)
Put on your thinking cap
Unable or unwilling to speak or talk (feline holding your taste organ)
Cat got your tongue?
Going against what the majority thinks or wants (teeter the water vessel)
Rock the Boat