(as) slow as molasses
US /əz sloʊ əz məˈlæsɪz/
UK /əz sloʊ əz məˈlæsɪz/

1.
sangat perlahan, perlahan sekali
extremely slow; moving or happening at a very low speed
:
•
The old computer runs as slow as molasses.
Komputer lama itu berjalan sangat perlahan.
•
Traffic was moving as slow as molasses on the highway.
Trafik bergerak sangat perlahan di lebuh raya.