“catch on”

• fishing

• to understand

• baseball

• catch a cold

“get your point across”

• to share your opinion

• sharp end

• pen

• move across

“make heads or tails of it”

• flip a coin

• rabbit tail

• to understand

• make dessert

“Greek to me”

• Greek islands

• Mama Mia

• not understand, a strange idea

• to know and understand

“in one ear and out the other”

• earache

• not listening

• to listen carefully

• to understand

“learn the ropes”

• tie a rope

• to study and learn about something

• use a rope for the boat

• to learn about ropes

“in over your head”

• a headache

• to sink

• to have a difficult problem, hard situation

• overhead compartment

“to grasp”

• to understand

• to grab

• to gasp for air

• a wasp

“get the message”

• to take a note

• message in the bottle

• to understand

• to hear a phone message

“2 heads are better than one”

• less people are better

• working alone is better

• more people or working in a group is better

• heads or tails