Happy
Joyful, excited, overjoyed, thrilled, etc
Dangerous
Safe
Bite your tongue
Stop talking
Don't cry over spilled milk
Don't get upset over something that's already over
Trunk
elephant's long nose, back of a car, large box to store things in
Scared
Afraid, fearful, terrified, petrified, etc
Rough
Smooth, easy, etc
Piece of cake
Easy
In over your head
Overwhelmed, have too much to do
Light
Not heavy, something bright that illuminates
Throw
Toss, pitch, pass, etc
Heavy
All ears
Listening intently
All tied up
Busy, unavailable, in the middle of something
Handle
Something you use to open/carry things, being able to manage a situation
Yank, jerk, tug, etc
Guilty
Innocent
Under the weather
Not feeling well, sick
Not my cup of tea
Not something I'm really into/interested in
Charge
Filling something up with power, racing towards someone aggressively, asking someone to pay for something
Strange
Weird, odd, different, interesting, unexpected, bizarre, etc
Send
Receive, get, etc
Lend a hand
Help someone
On the ball
Paying attention/aware; doing a good job with your responsibilities
Monitor
A screen, keeping an eye on something, a person who watches others to make sure their ok/doing the right thing