sucker
US /ˈsʌk.ɚ/
UK /ˈsʌk.ɚ/

1.
2.
a young animal, especially a calf, that is still suckling
:
•
The cow nudged her little sucker towards the udder.
•
The farmer watched the suckers feeding from their mothers.
3.
a rubber cup or disc that adheres to a surface by suction
:
•
The toy had a sucker on its base to stick to the window.
•
Attach the hook to the wall with the strong sucker.