What is a tongue sweller? They are just difficult words or phrases to pronounce.
Tongue swellers were an idea of Leon and Violet, back i 2011 in Canterbury. Each tongue sweller is a set of words with similar sounds where each word adds one more syllable to the previous word. Sometimes the stress patterns change and sometimes the vowel sounds change too. Here are a set of old slides, showing some examles of tricky phrases. If you know any others, please add them in he comments below.Next Tongue Sweller