Up-to-date slang

Quizz:

1. What kind of person is a "tool"?
2. If you "pancake somebody", what are you doing?

Belly button x Navel

What's the difference between these words?

Anatomy

Body parts:

Arm
Forearm
Neck
Thigh
Calf
Knee
Finger
Wrist
Elbow
Butt
Back
Shoulder
Forehead
Temples
Eye
Mouth
Chin
Ear
Cheek
Eyebrow
Hand
Chest
Belly
Leg
Ankle
Foot
Toe
Heel
Navel
Armpit
Lip
Eyelash
Eyelid
Earlobe
Nostril
Knuckle
Rib
Sole
Palm
Jaw
Shin
Throat
Nipple
Spine

You already know the sources you can search.