trickymarker
nounUK /ˈtrɪkiˌmɑːkə/
US /ˈtrɪkiˌmɑːrkər/
A trickymarker is a special pen that makes marks that are hard to see or hard to erase.
The teacher used a trickymarker to hide the answer on the card.
OTHER MEANINGS
2. A person who leaves clever clues for others to find.
The trickymarker left a trail of riddles around the school.
3. A small tool that makes a faint line you can only see in certain light.
He drew a trickymarker line that appeared under the lamp.
4. A game piece that changes its spot when you are not looking.
The trickymarker moved to a new square during the game.