As adverbs the difference between fatly and fastly
is that fatly is in a fat way while fastly is securely.
fastly
English
Etymology 1
From (etyl) .
Adverb
(
en adverb)
securely.
- We tied the rope fastly this time; we didn't want that mother fucking bitch to get away again.
Related terms
* fast (sense of being secure)
Etymology 2
From .