@Jojofromjerz
You gif by uploading your gif or simply pasting it in the post.
As to whether you can swear, that's up to the admins in your particular neck of the woods (mastodon server). Though, I can safely assume that you can, although some folk would appreciate some advance warning of the potty-mouth avalanche using the odd CW content warning which doubles as a subject line for posts.
Otherwise, it's all the same.