Here's a quick way to teach your phone's autocorrect to spell the right words for you. Open Safari, and type in your favourite cusses in the search bar, or search for whichever words you'd like autocorrect to stop correcting for you.

Then text all the f-bombs you want because your phone will no longer want to turn things you really want to say. You have to do this in Safari. It won't work in Chrome.

As MacWorld has pointed out, you can also add a new contact, and for the beginning of the last name type in zzz at the beginning of the last night space so the entry will live at the end of the alphabet. Then in other fields (title, first name, etc.), enter the words you want, separated by spaces, and your phone will remember all your favourite cusses.

No more ducking around!